Managed fiber connectivity systems

ABSTRACT

A communications connection system includes a fiber optic connector including a storage device having memory configured to store physical layer information. The storage device also includes at least one contact member that is electrically connected to the memory. Certain types of fiber optic connectors have the storage device mounted to a key of the fiber optic connector. Certain types of fiber optic connectors have the storage device mounted in a cavity defined in the fiber optic connector.

CROSS-REFERENCE TO RELATED APPLICATIOSN

This application is a continuation of U.S. application Ser. No.13/025,784, filed Feb. 11, 2011, which application claims the benefit ofU.S. Provisional Application No. 61/303,961, filed Feb. 12, 2010, titled“Fiber Plugs and Adapters for Managed Connectivity;” U.S. ProvisionalApplication No. 61/413,828, filed Nov. 15, 2010, titled “Fiber Plugs andAdapters for Managed Connectivity;” and U.S. Provisional Application No.61/437,504, filed Jan. 28, 2011, titled “Fiber Plugs and Adapters forManaged Connectivity,” which applications are incorporated herein byreference in their entirety.

BACKGROUND

In communications infrastructure installations, a variety ofcommunications devices can be used for switching, cross-connecting, andinterconnecting communications signal transmission paths in acommunications network. Some such communications devices are installedin one or more equipment racks to permit organized, high-densityinstallations to be achieved in limited space available for equipment.

Communications devices can be organized into communications networks,which typically include numerous logical communication links betweenvarious items of equipment. Often a single logical communication link isimplemented using several pieces of physical communication media. Forexample, a logical communication link between a computer and aninter-networking device such as a hub or router can be implemented asfollows. A first cable connects the computer to a jack mounted in awall. A second cable connects the wall-mounted jack to a port of a patchpanel, and a third cable connects the inter-networking device to anotherport of a patch panel. A “patch cord” cross connects the two together.In other words, a single logical communication link is often implementedusing several segments of physical communication media.

Network management systems (NMS) are typically aware of logicalcommunication links that exist in a communications network, buttypically do not have information about the specific physical layermedia (e.g., the communications devices, cables, couplers, etc.) thatare used to implement the logical communication links. Indeed, NMSsystems typically do not have the ability to display or otherwiseprovide information about how logical communication links areimplemented at the physical layer level.

SUMMARY

The present disclosure relates to communications connector assembliesand connector arrangements that provide physical layer managementcapabilities. In accordance with certain aspects, the disclosure relatesto fiber optic connector assemblies and connector arrangements.

One aspect of the present disclosure relates to a communications panelsystems and methods including one or more connector arrangements andconnector assemblies implemented as LC-type fiber optic connections.

Another aspect of the present disclosure relates to a communicationspanel systems and methods including one or more connector arrangementsand connector assemblies implemented as MPO-type fiber opticconnections.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of the description, illustrate several aspects of the presentdisclosure. A brief description of the drawings is as follows:

FIG. 1 is a block diagram of a portion of an example communications anddata management system in accordance with aspects of the presentdisclosure;

FIG. 2 is a block diagram of one embodiment of a communicationsmanagement system that includes PLI functionality as well as PLMfunctionality in accordance with aspects of the present disclosure;

FIG. 3 is a block diagram of one high-level example of a couplerassembly and media reading interface that are suitable for use in themanagement system of FIG. 2 in accordance with aspects of the presentdisclosure;

4-14 illustrate a first example implementation of a connector systemthat can be utilized on a connector assembly having PLI functionality aswell as PLM functionality in accordance with aspects of the presentdisclosure;

FIGS. 15-43 illustrate a second example implementation of a connectorsystem that can be utilized on a connector assembly having PLIfunctionality as well as PLM functionality in accordance with aspects ofthe present disclosure;

FIGS. 44-72 illustrate a third example implementation of a connectorsystem that can be utilized on a connector assembly having PLIfunctionality as well as PLM functionality in accordance with aspects ofthe present disclosure; and

FIGS. 73-95, 95A, and 96-107 illustrate a fourth example implementationof a connector system that can be utilized on a connector assemblyhaving PLI functionality as well as PLM functionality in accordance withaspects of the present disclosure.

DETAILED DESCRIPTION

Reference will now be made in detail to exemplary aspects of the presentdisclosure that are illustrated in the accompanying drawings. Whereverpossible, the same reference numbers will be used throughout thedrawings to refer to the same or like parts.

FIG. 1 is a diagram of a portion of an example communications and datamanagement system 100. The example system 100 shown in FIG. 1 includes apart of a communications network 101 along which communications signals51 pass. In one example implementation, the network 101 can include anInternet Protocol network. In other implementations, however, thecommunications network 101 may include other types of networks.

The communications network 101 includes interconnected networkcomponents (e.g., connector assemblies, inter-networking devices,internet working devices, servers, outlets, and end user equipment(e.g., computers)). In one example implementation, communicationssignals S1 pass from a computer, to a wall outlet, to a port ofcommunication panel, to a first port of an inter-networking device, outanother port of the inter-networking device, to a port of the same oranother communications panel, to a rack mounted server. In otherimplementations, the communications signals S1 may follow other pathswithin the communications network 101.

The portion of the communications network 101 shown in FIG. 1 includesfirst and second connector assemblies 130, 130′ at which communicationssignals S1 pass from one portion of the communications network 101 toanother portion of the communications network 101. Non-limiting examplesof connector assemblies 130, 130′ include, for example, rack-mountedconnector assemblies (e.g., patch panels, distribution units, and mediaconverters for fiber and copper physical communication media),wall-mounted connector assemblies (e.g., boxes, jacks, outlets, andmedia converters for fiber and copper physical communication media), andinter-networking devices (e.g., switches, routers, hubs, repeaters,gateways, and access points).

In the example shown, the first connector assembly 130 defines at leastone port 132 configured to communicatively couple at least a first mediasegment (e.g., cable) 105 to at least a second media segment (e.g.,cable) 115 to enable the communication signals S1 to pass between themedia segments 105, 115. The at least one port 132 of the firstconnector assembly 130 may be directly connected to a port 132′ of thesecond connector assembly 130′. As the term is used herein, the port 132is directly connected to the port 132′ when the communications signalsS1 pass between the two ports 132, 132′ without passing through anintermediate port. For example, plugging a first terminated end of apatch cable into the port 132 and a second terminated end of the patchcable into the port 132′ directly connects the ports 132, 132′.

The port 132 of the first connector assembly 130 also may be indirectlyconnected to the port 132′ of the second connector assembly 130′. As theterm is used herein, the port 132 is indirectly connected to the port132′ when the communications signals S1 pass through an intermediateport when traveling between the ports 132, 132′. For example, in oneimplementation, the communications signals S1 may be routed over onemedia segment from the port 132 at the first connector assembly 130, toa port of a third connector assembly at which the media segment iscoupled, to another media segment that is routed from the port of thethird connector assembly to the port 132′ of the second connectorassembly 130′.

Non-limiting examples of media segments include optical cables,electrical cables, and hybrid cables. The media segments may beterminated with electrical plugs, electrical jacks, fiber opticconnectors, fiber optic adapters, media converters, or other terminationcomponents. In the example shown, each media segment 105, 115 isterminated at a plug or connector 110, 120, respectively, which isconfigured to communicatively connect the media segments 105, 115. Forexample, in one implementation, the port 132 of the connector assembly130 can be configured to align ferrules of two fiber optic connectors110, 120. In another implementation, the port 132 of the connectorassembly 130 can be configured to electrically connect an electricalplug with an electrical socket (e.g., a jack). In yet anotherimplementation, the port 132 can include a media converter configured toconnect an optical fiber to an electrical conductor.

In accordance with some aspects, the connector assembly 130 does notactively manage (e.g., is passive with respect to) the communicationssignals S1 passing through port 132. For example, in someimplementations, the connector assembly 130 does not modify thecommunications signal S1 carried over the media segments 105, 115.Further, in some implementations, the connector assembly 130 does notread, store, or analyze the communications signal S1 carried over themedia segments 105, 115.

In accordance with aspects of the disclosure, the communications anddata management system 100 also provides physical layer information(PLI) functionality as well as physical layer management (PLM)functionality. As the term is used herein, “PLI functionality” refers tothe ability of a physical component or system to identify or otherwiseassociate physical layer information with some or all of the physicalcomponents used to implement the physical layer of the system. As theterm is used herein, “PLM functionality” refers to the ability of acomponent or system to manipulate or to enable others to manipulate thephysical components used to implement the physical layer of the system(e.g., to track what is connected to each component, to traceconnections that are made using the components, or to provide visualindications to a user at a selected component).

As the term is used herein, “physical layer information” refers toinformation about the identity, attributes, and/or status of thephysical components used to implement the physical layer of thecommunications system 101. In accordance with some aspects, physicallayer information of the communications system 101 can include mediainformation, device information, and location information.

As the term is used herein, “media information” refers to physical layerinformation pertaining to cables, plugs, connectors, and other suchphysical media. In accordance with some aspects, the media informationis stored on or in the physical media, themselves. In accordance withother aspects, the media information can be stored at one or more datarepositories for the communications system, either alternatively or inaddition to the media, themselves.

Non-limiting examples of media information include a part number, aserial number, a plug or other connector type, a conductor or fibertype, a cable or fiber length, cable polarity, a cable or fiberpass-through capacity, a date of manufacture, a manufacturing lotnumber, information about one or more visual attributes of physicalcommunication media (e.g., information about the color or shape of thephysical communication media or an image of the physical communicationmedia), and an insertion count (i.e., a record of the number of timesthe media segment has been connected to another media segment or networkcomponent). Media information also can include testing or media qualityor performance information. The testing or media quality or performanceinformation, for example, can be the results of testing that isperformed when a particular segment of media is manufactured.

As the term is used herein, “device information” refers to physicallayer information pertaining to the communications panels,inter-networking devices, media converters, computers, servers, walloutlets, and other physical communications devices to which the mediasegments attach. In accordance with some aspects, the device informationis stored on or in the devices, themselves. In accordance with otheraspects, the device information can be stored at one or more datarepositories for the communications system, either alternatively or inaddition to the devices, themselves. In accordance with still otheraspects, the device information can be stored in the media segmentsattached thereto. Non-limiting examples of device information include adevice identifier, a device type, port priority data (that associates apriority level with each port), and port updates (described in moredetail herein).

As the term is used herein, “location information” refers to physicallayer information pertaining to a physical layout of a building orbuildings in which the network 101 is deployed. Location informationalso can include information indicating where each communicationsdevice, media segment, network component, or other component isphysically located within the building. In accordance with some aspects,the location information of each system component is stored on or in therespective component. In accordance with other aspects, the locationinformation can be stored at one or more data repositories for thecommunications system, either alternatively or in addition to the systemcomponents, themselves.

In accordance with some aspects, one or more of the components of thecommunications network 101 are configured to store physical layerinformation pertaining to the component as will be disclosed in moredetail herein. In FIG. 1, the connectors 110, 120, the media segments105, 115, and/or the connector assemblies 130, 130′ may store physicallayer information. For example, in FIG. 1, each connector 110, 120 maystore information pertaining to itself (e.g., type of connector, data ofmanufacture, etc.) and/or to the respective media segment 105, 115(e.g., type of media, test results, etc.).

In another example implementation, the media segments 105, 115 orconnectors 110, 120 may store media information that includes a count ofthe number of times that the media segment (or connector) has beeninserted into port 132. In such an example, the count stored in or onthe media segment is updated each time the segment (or plug orconnector) is inserted into port 132. This insertion count value can beused, for example, for warranty purposes (e.g., to determine if theconnector has been inserted more than the number of times specified inthe warranty) or for security purposes (e.g., to detect unauthorizedinsertions of the physical communication media).

One or more of the components of the communications network 101 can readthe physical layer information from one or more media segments retainedthereat. In certain implementations, one or more network componentsincludes a media reading interface that is configured to read physicallayer information stored on or in the media segments or connectorsattached thereto. For example, in one implementation, the connectorassembly 130 includes a media reading interface 134 that can read mediainformation stored on the media cables 105, 115 retained within the port132. In another implementation, the media reading interface 134 can readmedia information stored on the connectors or plugs 110, 120 terminatingthe cables 105, 115, respectively.

In accordance with some aspects of the disclosure, the physical layerinformation read by a network component may be processed or stored atthe component. For example, in certain implementations, the firstconnector assembly 130 shown in FIG. 1 is configured to read physicallayer information stored on the connectors 110, 120 and/or on the mediasegments 105, 115 using media reading interface 134. Accordingly, inFIG. 1, the first connector assembly 130 may store not only physicallayer information about itself (e.g., the total number of availableports at that assembly 130, the number of ports currently in use, etc.),but also physical layer information about the connectors 110, 120inserted at the ports and/or about the media segments 105, 115 attachedto the connectors 110, 120.

The physical layer information obtained by the media reading interfacemay be communicated (see PLI signals S2) over the network 101 forprocessing and/or storage. In accordance with some aspects, thecommunications network 101 includes a data network (e.g., see network218 of FIG. 2) along which the physical layer information iscommunicated. At least some of the media segments and other componentsof the data network may be separate from those of the communicationsnetwork 101 to which such physical layer information pertains. Forexample, in some implementations, the first connector assembly 130 mayinclude a plurality of “normal” ports (e.g., fiber optic adapter ports)at which connectorized media segments (e.g., optical fibers) are coupledtogether to create a path for communications signals S1. The firstconnector assembly 130 also may include one or more PLI ports 136 atwhich the physical layer information (see PLI signals S2) are passed tocomponents of the data network (e.g., to one or more aggregation points150 and/or to one or more computer systems 160).

In other implementations, however, the physical layer information may becommunicated over the communications network 101 just like any othersignal, while at the same time not affecting the communication signalsS1 that pass through the connector assembly 130 on the normal ports 132.Indeed, in some implementations, the physical layer information may becommunicated as one or more of the communication signals S1 that passthrough the normal ports 132 of the connector assemblies 130, 130′. Forexample, in one implementation, a media segment may be routed betweenthe PLI port 136 and one of the “normal” ports 132. In anotherimplementation, the media segment may be routed between the PLI port 136and a “normal” port of another connector assembly. In suchimplementations, the physical layer information may be passed along thecommunications network 101 to other components of the communicationsnetwork 101 (e.g., to another connector assembly, to one or moreaggregation points 150 and/or to one or more computer systems 160). Byusing the network 101 to communicate physical layer informationpertaining to it, an entirely separate data network need not be providedand maintained in order to communicate such physical layer information.

For example, in the implementation shown in FIG. 1, each connectorassembly 130 includes at least one PLI port 136 that is separate fromthe “normal” ports 132 of the connector assembly 130. Physical layerinformation is communicated between the connector assembly 130 and thecommunications network 101 through the PLI port 136. Components of thecommunications network 101 may be connected to one or more aggregationdevices 150 and/or to one or more computing systems 160. In the exampleshown in FIG. 1, the connector assembly 130 is connected to arepresentative aggregation device 150, a representative computing system160, and to other components of the network 101 (see looped arrows) viathe PLI port 136.

In some implementations, some types of physical layer informationpertaining to media segments can be obtained by the connector assembly130 from a user at the connector assembly 130 via a user interface(e.g., a keypad, a scanner, a touch screen, buttons, etc.). For example,physical layer information pertaining to media that is not configured tostore such information can be entered manually into the connectorassembly 130 by the user. In certain implementations, the connectorassembly 130 can provide the physical layer information obtained fromthe user to other devices or systems that are coupled to thecommunications network 101 and/or a separate data network.

In other implementations, some or all physical layer information can beobtained by the connector assembly 130 from other devices or systemsthat are coupled to the communications network 101 and/or a separatedata network. For example, physical layer information pertaining tomedia that is not configured to store such information can be enteredmanually into another device or system (e.g., at the connector assembly130, at the computer 160, or at the aggregation point 150) that iscoupled to the network 101 and/or a separate data network.

In some implementations, some types of non-physical layer information(e.g., network information) also can be obtained by one networkcomponent (e.g., a connector assembly 130, an aggregation point 150, ora computer 160) from other devices or systems that are coupled to thecommunications network 101 and/or a separate data network. For example,the connector assembly 130 may pull non-physical layer information fromone or more components of the network 101. In other implementations, thenon-physical layer information can be obtained by the connector assembly130 from a user at the connector assembly 130.

In some implementations, the connector assembly 130 is configured tomodify (e.g., add, delete, and/or change) the physical layer informationstored in or on the segment of physical communication media 105, 115(i.e., or the associated connectors 110, 120). For example, in someimplementations, the media information stored in or on the segment ofphysical communication media 105, 115 can be updated to include theresults of testing that is performed when a segment of physical media isinstalled or otherwise checked. In other implementations, such testinginformation is supplied to the aggregation point 150 for storage and/orprocessing. The modification of the physical layer information does notaffect the communications signals S1 passing through the connectorassembly 130.

FIG. 2 is a block diagram of one example implementation of acommunications management system 200 that includes PLI functionality aswell as PLM functionality. The management system 200 comprises aplurality of connector assemblies 202. The management system 200includes one or more connector assemblies 202 connected to an IP network218. The connector assemblies 202 shown in FIG. 2 illustrate variousexample implementations of the connector assemblies 130, 30′ of FIG. 1.

Each connector assembly 202 includes one or more ports 204, each ofwhich is used to connect two or more segments of physical communicationmedia to one another (e.g., to implement a portion of a logicalcommunication link for communication signals S1 of FIG. 1). At leastsome of the connector assemblies 202 are designed for use with segmentsof physical communication media that have physical layer informationstored in or on them. The physical layer information is stored in or onthe segment of physical communication media in a manner that enables thestored information, when the segment is attached to a port 204, to beread by a programmable processor 206 associated with the connectorassembly 202.

Each programmable processor 206 is configured to execute software orfirmware that causes the programmable processor 206 to carry out variousfunctions described below. Each programmable processor 206 also includessuitable memory (not shown) that is coupled to the programmableprocessor 206 for storing program instructions and data. In general, theprogrammable processor 206 determines if a physical communication mediasegment is attached to a port 204 with which that processor 206 isassociated and, if one is, to read the identifier and attributeinformation stored in or on the attached physical communication mediasegment (if the segment includes such information stored therein orthereon) using the associated media reading interface 208.

In some implementations, each of the ports 204 of the connectorassemblies 202 comprises a respective media reading interface 208 viawhich the respective programmable processor 206 is able to determine ifa physical communication media segment is attached to that port 204 and,if one is, to read the physical layer information stored in or on theattached segment (if such media information is stored therein orthereon). In other implementations, a single media reading interface 208may correspond to two or more ports 204. The programmable processor 206associated with each connector assembly 202 is communicatively coupledto each of the media reading interfaces 208 using a suitable bus orother interconnect (not shown).

In FIG. 2, four example types of connector assembly configurations 210,212, 214, and 215 are shown. In the first connector assemblyconfiguration 210 shown in FIG. 2, each connector assembly 202 includesits own respective programmable processor 206 and its own respectivenetwork interface 216 that is used to communicatively couple thatconnector assembly 202 to an Internet Protocol (IP) network 218. In someimplementations, the ports 204 of the connector assemblies 202 alsoconnect to the IP network 218. In other implementations, however, onlythe network interfaces 216 couple to the IP network 218.

In the second type of connector assembly configuration 212, a group ofconnector assemblies 202 are physically located near each other (e.g.,in a rack, rack system, or equipment closet). Each of the connectorassemblies 202 in the group includes its own respective programmableprocessor 206. However, in the second connector assembly configuration212, some of the connector assemblies 202 (referred to here as“interfaced connector assemblies”) include their own respective networkinterfaces 216 while some of the connector assemblies 202 (referred tohere as “non-interfaced connector assemblies”) do not. Thenon-interfaced connector assemblies 202 are communicatively coupled toone or more of the interfaced connector assemblies 202 in the group vialocal connections. In this way, the non-interfaced connector assemblies202 are communicatively coupled to the IP network 218 via the networkinterface 216 included in one or more of the interfaced connectorassemblies 202 in the group. In the second type of connector assemblyconfiguration 212, the total number of network interfaces 216 used tocouple the connector assemblies 202 to the IP network 218 can bereduced. Moreover, in the particular implementation shown in FIG. 2, thenon-interfaced connector assemblies 202 are connected to the interfacedconnector assembly 202 using a daisy chain topology (though othertopologies can be used in other implementations and embodiments).

In the third type of connector assembly configuration 214, a group ofconnector assemblies 202 are physically located near each other (e.g.,within a rack, rack system, or equipment closet). Some of the connectorassemblies 202 in the group (also referred to here as “master” connectorassemblies 202) include both their own programmable processors 206 andnetwork interfaces 216, while some of the connector assemblies 202 (alsoreferred to here as “slave” connector assemblies 202) do not includetheir own programmable processors 206 or network interfaces 216. Each ofthe slave connector assemblies 202 is communicatively coupled to one ormore of the master connector assemblies 202 in the group via one or morelocal connections. The programmable processor 206 in each of the masterconnector assemblies 202 is able to carry out the PLM functions for boththe master connector assembly 202 of which it is a part and any slaveconnector assemblies 202 to which the master connector assembly 202 isconnected via the local connections. As a result, the cost associatedwith the slave connector assemblies 202 can be reduced. In theparticular implementation shown in FIG. 2, the slave connectorassemblies 202 are connected to a master connector assembly 202 in astar topology (though other topologies can be used in otherimplementations and embodiments).

In the fourth type of connector assembly configuration 215, a group ofconnector assemblies (e.g., distribution modules) 202 are housed withina common chassis or other enclosure. Each of the connector assemblies202 in the configuration 215 includes their own programmable processors206. In the context of this configuration 215, the programmableprocessors 206 in the connector assemblies 202 are “slave” processors206. Each of the slave programmable processors 206 in the group iscommunicatively coupled to a common “master” programmable processor 217(e.g., over a backplane included in the chassis or enclosure). Themaster programmable processor 217 is coupled to a network interface 216that is used to communicatively couple the master programmable processor217 to the IP network 218.

In the fourth configuration 215, each slave programmable processor 206is configured to manage the media reading interfaces 208 to determine ifphysical communication media segments are attached to the port 204 andto read the physical layer information stored in or on the attachedphysical communication media segments (if the attached segments havesuch information stored therein or thereon). The physical layerinformation is communicated from the slave programmable processor 206 ineach of the connector assemblies 202 in the chassis to the masterprocessor 217. The master processor 217 is configured to handle theprocessing associated with communicating the physical layer informationread from by the slave processors 206 to devices that are coupled to theIP network 218.

In accordance with some aspects, the communications management system200 includes functionality that enables the physical layer informationcaptured by the connector assemblies 202 to be used by application-layerfunctionality outside of the traditional physical-layer managementapplication domain. That is, the physical layer information is notretained in a PLM “island” used only for PLM purposes but is insteadmade available to other applications. For example, in the particularimplementation shown in FIG. 2, the management system 200 includes anaggregation point 220 that is communicatively coupled to the connectorassemblies 202 via the IP network 218.

The aggregation point 220 includes functionality that obtains physicallayer information from the connector assemblies 202 (and other devices)and stores the physical layer information in a data store. Theaggregation point 220 can be used to receive physical layer informationfrom various types of connector assemblies 202 that have functionalityfor automatically reading information stored in or on the segment ofphysical communication media. Also, the aggregation point 220 andaggregation functionality 224 can be used to receive physical layerinformation from other types of devices that have functionality forautomatically reading information stored in or on the segment ofphysical communication media. Examples of such devices include end-userdevices—such as computers, peripherals (e.g., printers, copiers, storagedevices, and scanners), and IP telephones—that include functionality forautomatically reading information stored in or on the segment ofphysical communication media.

The aggregation point 220 also can be used to obtain other types ofphysical layer information. For example, in this implementation, theaggregation point 220 also obtains information about physicalcommunication media segments that is not otherwise automaticallycommunicated to an aggregation point 220. This information can beprovided to the aggregation point 220, for example, by manually enteringsuch information into a file (e.g., a spreadsheet) and then uploadingthe file to the aggregation point 220 (e.g., using a web browser) inconnection with the initial installation of each of the various items.Such information can also, for example, be directly entered using a userinterface provided by the aggregation point 220 (e.g., using a webbrowser).

The aggregation point 220 also includes functionality that provides aninterface for external devices or entities to access the physical layerinformation maintained by the aggregation point 220. This access caninclude retrieving information from the aggregation point 220 as well assupplying information to the aggregation point 220. In thisimplementation, the aggregation point 220 is implemented as “middleware”that is able to provide such external devices and entities withtransparent and convenient access to the PLI maintained by the accesspoint 220. Because the aggregation point 220 aggregates PLI from therelevant devices on the IP network 218 and provides external devices andentities with access to such PLI, the external devices and entities donot need to individually interact with all of the devices in the IPnetwork 218 that provide PLI, nor do such devices need to have thecapacity to respond to requests from such external devices and entities.

For example, as shown in FIG. 2, a network management system (NMS) 230includes PLI functionality 232 that is configured to retrieve physicallayer information from the aggregation point 220 and provide it to theother parts of the NMS 230 for use thereby. The NMS 230 uses theretrieved physical layer information to perform one or more networkmanagement functions. In certain implementations, the NMS 230communicates with the aggregation point 220 over the IP network 218. Inother implementations, the NMS 230 may be directly connected to theaggregation point 220.

As shown in FIG. 2, an application 234 executing on a computer 236 alsocan use the API implemented by the aggregation point 220 to access thePLI information maintained by the aggregation point 220 (e.g., toretrieve such information from the aggregation point 220 and/or tosupply such information to the aggregation point 220). The computer 236is coupled to the IP network 218 and accesses the aggregation point 220over the IP network 218.

In the example shown in FIG. 2, one or more inter-networking devices 238used to implement the IP network 218 include physical layer information(PLI) functionality 240. The PLI functionality 240 of theinter-networking device 238 is configured to retrieve physical layerinformation from the aggregation point 220 and use the retrievedphysical layer information to perform one or more inter-networkingfunctions. Examples of inter-networking functions include Layer 1, Layer2, and Layer 3 (of the OSI model) inter-networking functions such as therouting, switching, repeating, bridging, and grooming of communicationtraffic that is received at the inter-networking device.

The aggregation point 220 can be implemented on a standalone networknode (e.g., a standalone computer running appropriate software) or canbe integrated along with other network functionality (e.g., integratedwith an element management system or network management system or othernetwork server or network element). Moreover, the functionality of theaggregation point 220 can be distribute across many nodes and devices inthe network and/or implemented, for example, in a hierarchical manner(e.g., with many levels of aggregation points). The IP network 218 caninclude one or more local area networks and/or wide area networks (e.g.,the Internet). As a result, the aggregation point 220, NMS 230, andcomputer 236 need not be located at the same site as each other or atthe same site as the connector assemblies 202 or the inter-networkingdevices 238.

Also, power can be supplied to the connector assemblies 202 usingconventional “Power over Ethernet” techniques specified in the IEEE802.3af standard, which is hereby incorporated herein by reference. Insuch an implementation, a power hub 242 or other power supplying device(located near or incorporated into an inter-networking device that iscoupled to each connector assembly 202) injects DC power onto one ormore power cables (e.g., a power wire included in a copper twisted-paircable) used to connect each connector assembly 202 to the IP network218.

FIG. 3 is a schematic diagram of one example connection system 1800including a connector assembly 1810 configured to collect physical layerinformation from at least one segment of physical communications media.The example connector assembly 1810 of FIG. 3 is configured to connectsegments of optical physical communications media in a physical layermanagement system. The connector assembly 1810 includes a fiber opticadapter defining at least one connection opening 1811 having a firstport end 1812 and a second port end 1814. A sleeve (e.g., a splitsleeve) 1803 is arranged within the connection opening 1811 of theadapter 1810 between the first and second port ends 1812, 1814. Eachport end 1812, 1814 is configured to receive a connector arrangement aswill be described in more detail herein.

A first example segment of optical physical communication media includesa first optical fiber 1822 terminated by a first connector arrangement1820. A second example segment of optical physical communication mediaincludes a second optical fiber 1832 terminated by a second connectorarrangement 1830. The first connector arrangement 1820 is plugged intothe first port end 1812 and the second connector arrangement 1830 isplugged into the second port end 1814. Each fiber connector arrangement1820, 1830 includes a ferrule 1824, 1834 through which optical signalsfrom the optical fiber 1822, 1832, respectively, pass.

The ferrules 1824, 1834 of the connector arrangements 1820, 1830 arealigned by the sleeve 1803 when the connector arrangements 1820, 1830are inserted into the connection opening 1811 of the adapter 1810.Aligning the ferrules 1824, 1834 provides optical coupling between theoptical fibers 1822, 1832. In some implementations, each segment ofoptical physical communication media (e.g., each optical fiber 1822,1832) carries communication signals (e.g., communications signals S1 ofFIG. 1). The aligned ferrules 1824, 1834 of the connector arrangements1820, 1830 create an optical path along which the communication signals(e.g., signals S1 of FIG. 1) may be carried.

In some implementations, the first connector arrangement 1820 mayinclude a storage device 1825 that is configured to store physical layerinformation (e.g., an identifier and/or attribute information)pertaining to the segment of physical communications media (e.g., thefirst connector arrangement 1820 and/or the fiber optic cable 1822terminated thereby). In some implementations, the connector arrangement1830 also includes a storage device 1835 that is configured to storeinformation (e.g., an identifier and/or attribute information)pertaining to the second connector arrangement 1830 and/or the secondoptic cable 1832 terminated thereby.

In one implementation, each of the storage devices 1825, 1835 isimplemented using an EEPROM (e.g., a PCB surface-mount EEPROM). In otherimplementations, the storage devices 1825, 1835 are implemented usingother non-volatile memory device. Each storage device 1825, 1835 isarranged and configured so that it does not interfere or interact withthe communications signals communicated over the media segments 1822,1832.

In accordance with some aspects, the adapter 1810 is coupled to at leasta first media reading interface 1816. In certain implementations, theadapter 1810 also is coupled to at least a second media interface 1818.In some implementations, the adapter 1810 is coupled to multiple mediareading interfaces. In certain implementations, the adapter 1810includes a media reading interface for each port end defined by theadapter 1810. In other implementations, the adapter 1810 includes amedia reading interface for each connection opening 1811 defined by theadapter 1810. In still other implementations, the adapter 1810 includesa media reading interface for each connector arrangement that theadapter 1810 is configured to receive. In still other implementations,the adapter 1810 includes a media reading interface for only a portionof the connector arrangement that the adapter 1810 is configured toreceive.

In some implementations, at least the first media reading interface 1816is mounted to a printed circuit board 1815. In the example shown, thefirst media reading interface 1816 of the printed circuit board 1815 isassociated with the first port end 1812 of the adapter 1810. In someimplementations, the printed circuit board 1815 also can include thesecond media reading interface 1818. In one such implementation, thesecond media reading interface 1818 is associated with the second portend 1814 of the adapter 1810.

The printed circuit board 1815 of the connector assembly 1810 can becommunicatively connected to one or more programmable processors (e.g.,processors 216 of FIG. 2) and/or to one or more network interfaces(e.g., network interfaces 216 of FIG. 2). The network interface may beconfigured to send the physical layer information (e.g., see signals S2o f FIG. 1) to a physical layer management network (e.g., seecommunications network 101 of FIG. 1 or IP network 218 of FIG. 2). Inone implementation, one or more such processors and interfaces can bearranged as components on the printed circuit board 1815. In anotherimplementation, one or more such processor and interfaces can bearranged on separate circuit boards that are coupled together. Forexample, the printed circuit board 1815 can couple to other circuitboards via a card edge type connection, a connector-to-connector typeconnection, a cable connection, etc.

When the first connector arrangement 1820 is received in the first portend 1812 of the adapter 1810, the first media reading interface 1816 isconfigured to enable reading (e.g., by the processor) of the informationstored in the storage device 1825. The information read from the firstconnector arrangement 1820 can be transferred through the printedcircuit board 1815 to a physical layer management network, e.g., network101 of FIG. 1, network 218 of FIG. 2, etc. When the second connectorarrangement 1830 is received in the second port end 1814 of the adapter1810, the second media reading interface 1818 is configured to enablereading (e.g., by the processor) of the information stored in thestorage device 1835. The information read from the second connectorarrangement 1830 can be transferred through the printed circuit board1815 or another circuit board to the physical layer management network.

In some such implementations, the storage devices 1825, 1835 and themedia reading interfaces 1816, 1818 each comprise three (3) leads—apower lead, a ground lead, and a data lead. The three leads of thestorage devices 1825, 1835 come into electrical contact with three (3)corresponding leads of the media reading interfaces 1816, 1818 when thecorresponding media segment is inserted in the corresponding port. Incertain example implementations, a two-line interface is used with asimple charge pump. In still other implementations, additional leads canbe provided (e.g., for potential future applications). Accordingly, thestorage devices 1825, 1835 and the media reading interfaces 1816, 1818may each include four (4) leads, five (5) leads, six (6) leads, etc.

FIGS. 4-12 illustrate a first example implementation of a connectorsystem 1000 that can be utilized on a connector assembly (e.g., acommunications panel) having PLI functionality as well as PLMfunctionality. One example connector assembly on which the connectorsystem 1000 can be implemented is a bladed chassis.

The connector system 1000 includes at least one example communicationscoupler assembly 1200 that can be mounted to a connector assembly, suchas a communications panel. One or more example connector arrangements1100, which terminate segments 1010 of communications media, areconfigured to communicatively couple to other segments of physicalcommunications media at the coupler assembly 1200 (FIG. 8). Accordingly,communications data signals carried by a media segment terminated by afirst connector arrangement 1100 can be propagated to another mediasegment (e.g., terminated by a second connector arrangement 1100)through the communications coupler assembly 1200.

FIGS. 4 and 8-14 show a portion of an example implementation of acommunications coupler assembly 1200 implemented as a fiber opticadapter. The example adapter 1200 includes an adapter housing 1210 towhich a printed circuit board 1220 is secured (e.g., via fasteners1222). In the example shown, the adapter 1200 is a quadruplex fiberoptic adapter. In other implementations, however, the adapter 1200 candefine greater or fewer ports.

FIGS. 4-7 show another example implementation of a connector arrangement1100 suitable for insertion into passages 1215 of an adapter housing1210. The same reference numbers are used herein to designate likeelements on both connector arrangements 1100 and 1100. The connectorarrangement 1100 includes one or more fiber optic connectors 1110, eachof which terminates one or more optical fibers 1010.

In accordance with some aspects, each connector arrangement 1100 isconfigured to terminate a single segment of physical communicationsmedia. For example, each connector arrangement 1100 can include a singleconnector housing 1110 that terminates a single optical fiber or asingle electrical conductor. In one example implementation, eachconnector arrangement 1100 includes a single LC-type fiber opticconnector 1110 that terminates a single optical fiber. In accordancewith other aspects, each connector arrangement 1100 includes two or moreconnector housings 1110, each of which terminates a single segment ofphysical communications media. For example, a duplex connectorarrangement 1100 may include two connector housings 1110, each of whichterminates an optical fiber 1010. In other implementations, theconnector housings 1110 can be an SC-type, an ST-type, an FC-type, anLX.5-type, etc.

In accordance with still other aspects, each connector arrangement 1100can include one or more connector housings, each of which terminates aplurality of physical media segments. In one example implementation,each connector arrangement includes a single MPO-type fiber opticconnector that terminates multiple optical fibers. In still othersystems, other types of connector arrangements (e.g., electricalconnector arrangements) can be secured to the communications couplerassembly 1200 or to a different type of connector assembly.

In the example shown in FIG. 4, the connector arrangement 1100 defines aduplex fiber optic connector arrangement including two LC-type fiberoptic connectors 1110 held together using a clip 1150. As shown in FIG.5, each fiber optic connector 1110 includes a connector body 1111enclosing a ferrule 1112 that retains an optical fiber 1010. Eachconnector body 1111 is secured to a boot 1113 for providing bendprotection to the optical fiber 1010. The connector body 1111 includes afastening member (e.g., clip arm) 1114 that facilitates retaining thefiber optic connector 1110 within a passage 1215 in the adapter housing1210. The body 1111 also defines a through hole (or opposingdepressions) 1117 to facilitate maintaining the body 1111 within theclip 1150 (e.g., see FIG. 6).

Each connector arrangement 1100 is configured to store physical layerinformation. For example, the physical layer information can be storedon or in the body 1111 of one or more of the fiber optic connectors1110. In the example shown, physical layer information is stored on onlyone fiber optic connector 1110 of the connector arrangement 1100. Inother implementations, however, physical layer information can be storedon each fiber optic connector 1110.

One example storage device 1130 includes a printed circuit board 1131 onwhich memory circuitry can be arranged. In one example implementation,the storage device 1130 includes an EEPROM circuit arranged on theprinted circuit board 1131. In other embodiments, however, the storagedevice 1130 can include any suitable type of memory. In the exampleshown in FIGS. 5-7, the memory circuitry is arranged on the non-visibleside of the printed circuit board 1131.

Electrical contacts 1132 are arranged on the visible side of the printedcircuit board 1131 in FIG. 4-7. The electrical contacts 1132 of eachstorage device 1130 are configured to engage with contacts of a mediareading interface of the adapter 1200, which will be discussed in moredetail herein. In the example shown in FIG. 5, the contacts 1132 defineplanar surfaces extending in a front-to-rear direction. In oneimplementation, the contacts 1132 are configured to promote even wearamongst the contacts 1132. In some implementations, the contacts 1132alternate between long and short planar surfaces. For example, contacts1132A and 1132C are longer than contacts 1132B and 1132D.

In the example in FIG. 5, the connector bodies 1111 each include a key1115 configured to fit with latch engagement channels 1217 of theadapter body 1210. The key 1115 of one or more connectors 1110 isconfigured to accommodate a storage device 1130 on which the physicallayer information can be stored. For example, the key 1115 of at leastone of the connectors 1110 defines a cavity 1116 in which the storagedevice 1130 can be mounted. In some implementations, a cover can bepositioned over the storage device 1130 to enclose the storage device1130 within the respective connector housing 1111. In otherimplementations, the storage device 1130 is left exposed.

In the example shown in FIGS. 6 and 7, two fiber optic connectors 1110are secured together using a clip 1150. The example clip 1150 includes abody 1151 that at least partially encloses the connectors 1110 to besecured. The clip 1150 defines openings or channels 1152 through whichportions 1119 of the fiber optic connector bodies 1111 can extend (seeFIG. 6). A flange 1153 curves upwardly and forwardly to extend over thefastening members 1114 of the connectors 1110 (see FIG. 7). In certainimplementations, indicia 1154 can be printed on the clip 1150 toidentify the fiber optic connectors 1110. In the example shown, theindicia 1154 are printed on or adjacent the flange 1153 at the rear sideof the clip 1150 (see FIG. 4).

In the example shown, the clip 1150 has a monolithic body 1151 definingtwo channels 1152 separated by an interior wall 1156. Lugs 1157 arepositioned on the inner surfaces of the exterior walls of the body 1151and on both sides of the interior wall 1156. The lugs 1157 areconfigured to engage cavities/depressions 1117 defined in the fiberoptic connector bodies 1111 to secure the connector bodies 1111 withinthe clip body 1151.

FIGS. 8-14 show a portion of one example implementation of a fiber opticadapter 1200. The example adapter 1200 includes an adapter housing 1210to which a printed circuit board 1220 is secured (e.g., via fasteners1222). In some implementations, the example adapter housing 1210includes two annular walls 1281 in which the fasteners 1222 can beinserted to hold the printed circuit board 1220 to the adapter housing1210. Non-limiting examples of suitable fasteners 1222 include screws,snaps, and rivets. For ease in understanding, only a portion of theprinted circuit board 1220 is shown in FIGS. 4 and 8. It is to beunderstood that the printed circuit board 1220 electrically connects toa data processor and/or to a network interface (e.g., processor 217 andnetwork interface 216 of FIG. 2). It is further to be understood thatmultiple adapters 1200 can be connected to the printed circuit board1220 within a communications panel.

The example adapter housing 1210 shown in FIG. 8 is formed from opposingsides 1211 interconnected by first and second ends 1212. The sides 1211and ends 1212 each extend between an open front and an open rear. Thecoupler housing 1210 defines one or more passages 1215 extending betweenthe front and rear ends. Each end of each passage 1215 is configured toreceive a connector arrangement or portion thereof (e.g., one fiberoptic connector 1110 of duplex connector arrangement 1100 of FIG. 7).

In the example shown in FIG. 8, the adapter body 1210 defines fourpassages 1215. In other implementations, the adapter body 1210 candefine greater or fewer passages 1215. Sleeves (e.g., split sleeves)1216 are positioned within the passages 1215 to receive and align theferrules 1112 of fiber optic connectors 1110 (see FIG. 14). The adapterhousing 1210 also defines latch engagement channels 1217 at the frontand rear of each passage 1215 to facilitate retention of the latch arms1114 of the fiber optic connectors 1110.

The fiber optic adapter 1210 includes one or more media readinginterfaces 1230, each configured to acquire the physical layerinformation from the storage device 1130 of a fiber optic connector 1110plugged into the fiber optic adapter 1210. For example, in oneimplementation, the adapter 1210 can include a media reading interface1230 associated with each passage 1215. In another implementation, theadapter 1210 can include a media reading interface 1230 associated witheach connection end of each passage 1215. In still otherimplementations, the adapter 1210 can include a media reading interface1230 associated with each set of ports that accommodates a connectorarrangement 1100.

For example, the quadruplex adapter 1210 shown in FIG. 9 includes twomedia reading interfaces 1230 at the front to interface with two duplexfiber optic connector arrangements 1100 to be received thereat and twomedia reading interfaces 1230 at the rear to interface with two duplexfiber optic connector arrangements 1100 to be received thereat. Inanother implementation, the adapter housing 1210 can include two mediareading interfaces 1230 at one side to interface with two duplex fiberoptic connector arrangements 1100 and four media reading interfaces 1230at the other side to interface with four fiber optic connectors 1110. Inother implementations, the adapter housing 1210 can include any desiredcombination of front and rear media reading interfaces 1230.

In general, each media reading interface 1230 is formed from one or morecontact members 1231 (FIG. 12). In certain implementations, the adapterhousing 1210 defines slots 1214 configured to receive one or morecontact members 1231. In the example shown in FIGS. 9 and 10, the slots1214 accommodating each media reading interface 1230 define fourseparate openings. In some implementations, the slots 1214 areconfigured so that portions of the contact members 1231 extend into thepassages 1215 to engage the electrical contacts 1132 of the storagemember 1130 positioned in the passages 1215 (see FIG. 11). Otherportions of the contact members 1231 are configured to engage contactsand tracings on the printed circuit board 1220 associated with theadapter 1200. In the example shown in FIG. 8, the contacts and tracingson the printed circuit board 1220 that interact with the contact members1231 are positioned on the non-visible side of the board 1220.

One example type of contact member 1231 is shown in FIG. 12. In oneimplementation, the contact member 1231 defines a planar body. In oneimplementation, the contact member 1231 is formed monolithically (e.g.,from a continuous sheet of metal or other material). For example, insome implementations, the contact member 1231 may be manufactured bycutting a planar sheet of metal or other material. In otherimplementations, the contact member 1231 may be manufactured by etchinga planar sheet of metal or other material. In other implementations, thecontact member 1231 may be manufactured by laser trimming a planar sheetof metal or other material. In still other implementations, the contactmember 1231 may be manufactured by stamping a planar sheet of metal orother material.

Each contact member 1231 defines at least three moveable contactlocations 1233, 1235, and 1236. The flexibility of the contact surfaces1233, 1235, and 1236 provides tolerance for differences in spacingbetween the contact member 1231 and the respective printed circuit board1220 when the coupler assembly 1200 is manufactured. Certain types ofcontact members 1231 also include at least one stationary contact 1237.

In some implementations, the contact members 1231 of a single mediareading interface 1230 are positioned in a staggered configuration tofacilitate access to the contact pads 1132 on the connector storagedevice 1130 of a connector arrangement 1100. For example, as shown inFIG. 14, alternating contact members 1231 can be staggered between atleast front and rear locations within the slots 1214.

In some implementations, the contact members 1231 of a single mediareading interface 1230 are staggered to facilitate access to the contactpads 1132 on the connector storage device 1130. For example, as shown inFIGS. 9 and 10, alternating contact members 1231 can be staggeredbetween at least first and second locations within the slots 1214 (seeconfiguration C2, shown in detail in FIG. 10). Likewise, in someimplementations, the contact pads 1132 on each storage device 1130 canbe arranged in staggered positions. In other implementations, thecontact pads 1132 on each storage device 1130 can vary in size and/orshape to facilitate a one-to-one connection between the contact members1231 and the contact pads 1132 (e.g., see pads 1132 in FIG. 5).

In the example shown in FIG. 9, each media reading interface 1230 of thefiber optic adapter 1200 includes four contact members 1231. A firstcontact member 1231A and a third contact member 1231 C of the mediareading interface 1230 are mounted at first positions with the slot 1214(see FIG. 14). A second contact member 1231B and a fourth contact member1231D of the media reading interface 1230 are mounted at secondpositions within the slot 1214. In the example shown in FIG. 14, firstand third contact pads 1132A, 1132C of the storage device 1130 extend afirst distance over the board 1131 and second and fourth contact pads1132B, 1132D extend a second distance over the board 1131.

In the example shown in FIG. 11, at least portions of two contactmembers 1231 are visibly positioned within a slot 1214 defined in afiber optic adapter 1210, shown in cross-section. Two additional contactmembers 1231 also are positioned in the slot 1214 (see FIG. 10), butcannot be seen since the additional contact members 1231 laterally alignwith the visible contact members 1231. In other implementations,however, greater or fewer contact members 1231 may be positioned withinthe housing 1210.

The example contact member 1231 shown includes a base 1232 that isconfigured to be positioned within a slot 1214 defined by an adapter1210. The base 1232 of certain types of contact members 1231 isconfigured to secure (e.g., snap-fit, latch, pressure-fit, etc.) to theadapter 1210. The base 1232 also can include a retention section 1238that secures the member 1231 in the adapter body 1210 (e.g., see FIG.11). An exploded view of the retention section 1238 is shown in FIG. 13.

A stationary contact location 1237 may extend from the base 1232,through the slot 1214, toward the printed circuit board 1220 to touch acontact pad or a grounding line on the printed circuit board 1220. Afirst arm extends from the base 1232 to define the first contactlocation 1233. A second arm extends from the base 1232 to define aresilient section 1234, the second contact location 1235, and the thirdcontact location 1236. The first and second arms extend generally awayfrom the passage 1215 and toward an exterior of the adapter housing 1210at the first and third contact locations 1233, 1236 (see FIG. 11).

At least the first moveable contact location 1233 is aligned andconfigured to extend outwardly of the adapter housing 1210 through theslots 1214 to touch a first contact pad on the corresponding circuitboard 1220 when the printed circuit board 1220 is mounted to the adapterhousing 1210. The ability of the first arm to flex relative to thestationary contact 1237 provides tolerance for placement of the contactmember 1231 relative to the circuit board 1220. In certainimplementations, the first moveable contact location 1233 touches thesame contact pad as the stationary contact location 1237. In oneimplementation, the stationary contact location 1237 and the firstmoveable contact location 1233 provide grounding of the contact member1231.

The second arm extends from the base 1232 to define the resilientsection 1234, the second moveable contact location 1235, and the thirdmoveable contact location 1236. In one implementation, the secondcontact location 1235 defines a trough located on the second arm betweenthe resilient section 1234 and the third contact location 1236. Theresilient section 1234 is configured to bias the second contact location1235 towards the channel passage 1215 (see FIG. 11). In someimplementations, the second contact location 1235 extends sufficientlyinto the passage 1215 to enable engagement between the second contactlocation 1235 and the connector body 1111 (e.g., key 1115) of theconnector 1110.

The third contact location 1236 is configured to be positioned initiallywithin the passage 1215. For example, the resilient section 1234 biasesthe third contact section 1236 away from an exterior of the housing 1210when a fiber optic connector 1110 is not inserted into the passage 1215.The resilient section 1234 is configured to bias the third contactlocation 1236 through the slot 1214 to an exterior of the housing 1210when a connector arrangement 1100 or other media segment pushes againstthe second contact location 1235. In the example shown, the resilientsection 1234 is implemented as a looped/bent section of the second arm.In other implementations, the second arm can otherwise include springs,reduced width sections, or portions formed from more resilientmaterials. In other implementations, other types of contact members canbe utilized.

In accordance with some aspects, insertion of the connector body 1111into the passage 1215 causes the third contact location 1236 to contactthe printed circuit board 1220. For example, in some implementations,the key 1115 of the connector body 1111 contacts the second contactlocation 1235 on the contact member 1231 when the connector 1110 isinserted into the passage 1215. When the key 1115 engages the secondcontact location 1235, the key 1115 pushes against the second contactlocation 1235 to move the third contact location 1236 against the biasof the resilient section 1234 toward the exterior of the adapter housing1210 sufficient to contact the contact pads and tracings on the printedcircuit board 1220.

As discussed above, a processor (e.g., processor 217 of FIG. 2) or othersuch equipment also can be electrically coupled to the printed circuitboard 1220. Accordingly, the processor can communicate with the memorycircuitry on the storage device 1130 via the contact members 1231 andthe printed circuit board 1220. In accordance with some aspects, theprocessor is configured to obtain physical layer information from thestorage device 1130. In accordance with other aspects, the processor isconfigured to write (e.g., new or revised) physical layer information tothe storage device 1130. In accordance with other aspects, the processoris configured to delete physical layer information to the storage device1130. In one example implementation, at least a first contact member1231 transfers power, at least a second contact member 1231 transfersdata, and at least a third contact member 1231 provide grounding.However, any suitable number of contact members 1231 can be utilizedwithin each media reading interface 1230.

In accordance with some aspects, the contact members 1231 of a mediareading interface 1230 are configured to form a complete circuit withthe printed circuit board 1220 only when a portion (e.g., the key 1115)of a fiber optic connector 1110 is inserted within the respectivepassage 1215. For example, the second contact locations 1235 of eachcontact member 1231 can be configured to raise the third contactlocation 1236 external of the housing 1210 through the slot 1214 whenthe second contact location 1235 is lifted by the key 1115.

Accordingly, the contact members 1231 can function as presence detectionsensors or switches. For example, a completion of a circuit between theprinted circuit board 1220 and a media reading interface 1230 canindicate that fiber optic connector 1110 is received within the passage1215. In other example implementations, the contact members 1231 can beconfigured to complete the circuit until one or more portions are pushedaway from a shorting rod by a media segment. In accordance with otheraspects, some implementations of the contact members 1231 can beconfigured to form a complete circuit with the printed circuit board1220 regardless of whether a media segment is received in the passage1215.

If the connector 1110 inserted into the passage 1215 carries a storagedevice 1130;, then insertion of the connector 1110 sufficiently far intothe passage 1215 aligns one or more contact pads 1132 on a storagedevice 1130 with contact members 1231 of the media reading interface1230. Accordingly, the processor (e.g., a main processor) coupled to theprinted circuit board 1220 is communicatively coupled to the storagedevice 1130 of the fiber optic connector 1110 through the contact member1231. In some implementations, the second contact location 1235 of eachcontact member 1231 is aligned with one of the contact pads 1132 of astorage device 1130 when the connector 1110 is fully inserted into thepassage 1215. In other implementations, the second contact locations1235 are sufficiently aligned with the contact pads 1132 to enablecommunication between the printed circuit board 1220 and the storagedevice 1130 even before the connector 1110 is fully inserted into thepassage 1215.

As shown in FIG. 14, dust caps 1250 can be mounted within the adapterpassages 1215, 1215 when connectors 1110, 1110 are not received thereat.The dust caps 1250 can inhibit dust, dirt, or other contaminants fromentering the passages 1215, 1215 when the passages 1215, 1215 are notbeing utilized.

One example dust cap 1250 is shown in FIG. 14. In the example shown, thedust cap 1250 includes a cover 1251 configured to fit over a mouth of apassage 1215, 1215. A handle including a grip 1255 and a stem 1256extend outwardly from a first side of the cover 1251. The handlefacilitates insertion and withdrawal of the dust cap 1250 from thepassage 1215, 1215. Insertion members 1252 extend outwardly from asecond side of the cover 1251. Each insertion member 1252 is configuredto fit within a passage 1215, 1215 of the adapter housing 1210, 1210 tohold the dust cap 1250 at the port.

In the example shown, each dust cap 1250 is a duplex dust cap thatincludes two insertion members 1252. In other implementations, however,each dust cap 1250 can include greater or fewer insertion members 1252.In the example shown, each insertion member 1252 is shaped similarly toa fiber optic connector that is configured to be retained at a port ofeach passage 1215, 1215. For example, each insertion member 1252 caninclude a retaining member 1253 that is configured to interface with thelatch engagement structures 1217, 1217 of the adapter housing 1210,1210.

In some implementations, the dust caps 1250 are shaped and configured toavoid triggering the presence detection sensor/switch formed by themedia reading interfaces (e.g., see FIGS. 68 and 155). Accordingly,insertion of a dust cap 1250 into a passage 1215, 1215 does not triggerthe presence switch associated with the passage 1215, 1215. For example,the dust caps 1250 can be shaped and configured to inhibit engaging thesecond contact location 1235 of the contact members 1231 associated withthe respective passage 1215. In the example shown, the front ends of theinsertion members 1252 do not include raised portions (e.g., raisedportions 1115, 1115 of fiber optic connectors 1110, 1110).

In other implementations, the dust caps 1250 may include storage devicescontaining physical layer information. In such implementations, the dustcaps 1250 may be shaped and configured to trigger the presence switchthrough interaction with the contact members 1231, 1231 and to be readthrough the media reading interfaces 1230, 1230 of the passage 1215,1215.

FIGS. 15-43 illustrate a second example implementation of a connectorsystem 2000 that can be utilized on a connector assembly having PLIfunctionality as well as PLM functionality. The example connector system2000 includes at least one communications coupler assembly 2200positioned between two printed circuit boards 2220.

One or more example connector arrangements 2100 (FIG. 23), whichterminate segments 1010 of communications media, are configured tocommunicatively couple to other segments of physical communicationsmedia at the one or more communications coupler assemblies 2200. Thesame reference numbers are used herein to designate like elements onboth connector arrangements 2100 and 2100. Accordingly, communicationsdata signals carried by the media segments 1010 terminated by theconnector arrangements 2100 can be transmitted to other media segments.

In the example shown in FIGS. 15 and 16, eight coupler housings 2210 aresandwiched between a first printed circuit board 2220A and a secondprinted circuit board 2220B (e.g., via fasteners 2222). In someimplementations, the first printed circuit board 2220A can beelectrically coupled to the second printed circuit board 2220B via afixed connector (e.g., a card edge connector). In other implementations,the first printed circuit board 2220A can be electrically coupled to thesecond printed circuit board 2220B via a flexible or ribbon cablearrangement. In still other implementations, the printed circuit boards2220A, 2220B are interconnected using other suitable circuit boardconnection techniques.

In the example shown, each coupler housing 2210 defines a single passage2215 extending between opposite open ends. In other exampleimplementations, however, each coupler housing 2210 can include agreater number (e.g., two, three, four, six, eight, twelve, etc.) ofpassages 2215. Each open end of each passage 2215 is configured toreceive a segment of communications media (e.g., a connectorized end ofan optical fiber) 1010. In other implementations, the example connectorsystem 2000 can include greater or fewer coupler housings 2210.

For ease in understanding, only portions of the example printed circuitboards 2220 of the connector system 2000 are shown in FIGS. 15 and 16.It is to be understood that the printed circuit boards 2220 electricallyconnect to a data processor and/or to a network interface (e.g.,processor 217 and network interface 216 of FIG. 2) as part of aconnector assembly. As noted above, non-limiting examples of suchconnector assemblies include bladed chassis and drawer chassis.Furthermore, additional coupler housings 2210 can be connected todifferent portions of the printed circuit boards 2220 or at otherlocations within an example connector assembly.

One example coupler housing 2210 is shown in FIGS. 17-22. In the exampleshown, each coupler housing 2210 is implemented as a fiber optic adapterconfigured to receive Multi-Fiber Push-On (MPO) connectors. Each passage2215 of the MPO adapters 2210 is configured to align and connect two MPOconnector arrangements 2100 (FIG. 23). In other implementations, eachpassage 2215 can be configured to connect other types of physical mediasegments. For example, one or more passages 2215 of the MPO adapters2200 can be configured to communicatively couple together an MPOconnector arrangement 2100 with a media converter (not shown) to convertthe optical data signals into electrical data signals, wireless datasignals, or other type of data signals.

The example coupler housing 2210 is formed from opposing sides 2211interconnected by first and second ends 2212. The sides 2211 and ends2212 each extend between an open front and an open rear to definepassages 2215. In the example shown in FIG. 17, the sides 2211 aregenerally flat. The coupler housing 2210 also defines mounting stations2217 at which fasteners 2222 can be received to secure the couplerhousing 2210 to one or more printed circuit boards 2220. For example,the mounting stations 2217 can aid in securing the coupler housing 2210to the upper circuit board 2220A and the lower circuit board 2220B shownin FIG. 15. In the example shown, each mounting station 2217 defines anopening in the first and second ends 2212 in which the fasteners 2222can be inserted. Non-limiting examples of suitable fasteners 2222include screws, snaps, and rivets. In other implementations, themounting stations 2217 can include latches, panel guides, or other panelmounting arrangements.

In some implementations, flexible latching tabs 2219 are located at theentrances of the passages 2215 to aid in retaining connectorarrangements within the passages 2215. In the example shown, eachlatching tab 2219 defines a ramped surface and latching surface. Thecoupler housings 2210 also define channels 2218 extending partly alongthe length of the passages 2215 (e.g., see FIGS. 19 and 22) toaccommodate portions of the fiber connector arrangements 2100. In someimplementations, the adapter 2210 may define a channel 2218 extendinginwardly from each open end of the passage 2215. In one exampleimplementation, a first channel 2218 extends along a top of the housing2210 from a first end of each passage 2215 and a second channel 2218extends along a bottom of the housing 2210 from a second end of eachpassage 2215.

Each adapter housing 2210 includes at least one media reading interface2230 (e.g., see FIG. 16) configured to acquire the physical layerinformation from a storage device 2130 of a fiber connector arrangement2100 (see FIGS. 23-26). In the example shown in FIG. 16, each MPOadapter 2210 includes at least one media reading interface 2230 that isconfigured to communicate with the storage device 2130 on an MPOconnector 2110 plugged into the MPO adapter 2210. For example, in oneimplementation, the adapter 2210 can include a media reading interface2230 associated with each passage 2215. In another implementation, theadapter 2210 can include a media reading interface 2230 associated witheach connection end of a passage 2215.

FIGS. 23-26 show one example implementation of a connector arrangementimplemented as an MPO connector 2100 that is configured to terminatemultiple optical fibers. As shown in FIG. 23, each MPO connector 2100includes a connector body 2110 enclosing a ferrule 2112 that retainsmultiple optical fibers (e.g., 2, 3, 4, 8, 12, or 16 fibers). Theconnector body 2110 is secured to a boot 2113 to provide bend protectionto the optical fibers.

The connector arrangement 2100 is configured to store physical layerinformation (e.g., media information). For example, the physical layerinformation can be stored in a memory device 2130 mounted on or in theconnector body 2110. In the example shown in FIG. 23, the connector body2110 includes a key 2115 configured to accommodate the storage device2130 on which the physical layer information is stored. The key 2115includes a raised (i.e., or stepped up) portion of the connector body2110 located adjacent the ferrule 2112. The raised portion 2115 definesa cavity 2116 in which the storage device 2130 can be positioned. Insome implementations, the cavity 2116 is two-tiered (e.g., see FIGS. 24and 26), thereby providing a shoulder on which the storage device 2130can rest and space to accommodate circuitry located on a bottom of thestorage device 2130. In other implementations, the storage device 2130can be otherwise mounted to the connector housing 2110.

One example storage device 2130 includes a printed circuit board 2131 towhich memory circuitry can be arranged. In one example embodiment, thestorage device 2130 includes an EEPROM circuit arranged on the printedcircuit board 2131. In other embodiments, however, the storage device2130 can include any suitable type of memory. In the example shown inFIG. 23, the memory circuitry is arranged on the non-visible side of theprinted circuit board 2131. Electrical contacts 2132 (FIG. 23) also arearranged on the printed circuit board 2131 for interaction with a mediareading interface 2230 of the connector assembly 2200.

In the example shown in FIG. 23, the contacts 2132 define planarsurfaces extending in a front-to-rear direction. In one implementation,the contacts 2132 are configured to promote even wear amongst thecontacts 2132. In some implementations, the contacts 2132 alternatebetween long and short planar surfaces. For example, contacts 2132A and2132C are longer than contacts 2132B and 2132D (see FIG. 23).

FIGS. 27-34 show the media reading interface 2230 of the MPO adapter2200 in accordance with some implementations. In the example shown, theMPO adapter housing 2210 includes a first media reading interface 2230Aand a second media reading interface 2230B. In some implementations, thefirst media reading interface 2230A is associated with a firstconnection end of the passage 2215 and the second media readinginterface 2230B is associated with a second connection end of thepassage 2215 (see FIGS. 32-33).

In the example shown, the second media reading interface 2230B isflipped (i.e., located on an opposite side of the housing 2210) relativeto the first media reading interface 2230A (e.g., see FIGS. 32-33). Insome such implementations, the channel 2218 extending inwardly from thefirst connection end of the passage 2215 also is flipped with respect tothe channel 2218 extending inwardly from the second end of the passage2215 (e.g., see FIG. 32). In some implementations, one or both ends 2212of the adapter housing 2210 defines slots 2214 (e.g., see FIGS. 17 and22) that lead to the channels 2218 (see FIGS. 32 and 33). The channels2218 are each configured to receive a media reading interface 2230through the respective slots 2214.

In the example shown in FIGS. 20, 21, 32, and 33, flipping theorientation of the connectors 2110 between the front and rear portsenables each of the major surfaces 2212 of the adapter 2210 to beconfigured to receive only one media reading interface 2130 for eachpassage 2215. For example, the media reading interfaces 2130 for thefront ports of the passages 2215 are accommodated by a first of themajor surfaces 2212 and the media reading interfaces 2130 for the rearports of the passages 2215 are accommodated by a second of the majorsurfaces 2212. Such a configuration enables each slot 2214 to extend atleast half-way between the front and rear of the adapter 2210.

In other implementations, each major surface 2212 of the adapter 2210may accommodate the media reading interfaces 2130 for some of the frontports and some of the rear ports. For example, in one implementation,each major surface 2212 accommodates the media reading interfaces foralternating ones of the front and rear ports. In particular, a firstslot in the first major surface 2212 may accommodate a media readinginterface 2130 for a front port of a first passage 2215 and a first slot2214 in the second major surface 2212 may accommodate a media readinginterface 2130 for a rear port of the first passage 2215. A second slot2214 in the first major surface 2212 may accommodate a media readinginterface 2130 for a rear port of a second passage 2215 and a secondslot 2214 in the second major surface 2212 may accommodate a mediareading interface 2130 for a front port of the second passage 2215. Suchconfigurations also enable each slot 2214 to extend more than half-waybetween the front and rear of the adapter 2210.

Lengthening the slots 2214 enables longer contact members 2231 to bereceived within each slot 2214. For example, each contact member 2231may extend at least half-way across the adapter 2210 between the frontand rear of the adapter 2210. In certain implementations, each contactmember 2231 may extend across a majority of the distance between thefront and rear of the adapter 2210. Lengthening the contact members 2231increases the beam length of each contact member 2231. The beam lengthaffects the ability of the contact member 2231 to deflect toward andaway from the circuit boards 2220.

In general, each media reading interface 2230 is formed from one or morecontact members 2231. Portions of the contact members 2231 extend intothe passage 2215 of the MPO adapter 2210 through the respective channel2218 (e.g., see FIGS. 32-33) to engage the electrical contacts 2132 ofthe storage member 2130 of any MPO connector positioned in the passage2215. Other portions of the contact members 2231 are configured toprotrude outwardly from the channel 2218 through the slots 2214 toengage contacts and tracings on a printed circuit board 2220 associatedwith the connector assembly 2200 (e.g., see FIG. 43).

In some implementations, the contact members 2231 of a single mediareading interface 2230 are positioned in a staggered configuration tofacilitate access to the contact pads 2132 on the connector storagedevice 2130 of a connector arrangement 2100. For example, as shown inFIG. 34, alternating contact members 2231 can be staggered between atleast front and rear locations within the channels 2218. Likewise, insome implementations, the contact pads 2132 on each storage device 2130can be arranged in staggered positions. In other implementations, thecontact pads 2132 on each storage device 2130 can vary in size and/orshape (e.g., see pads 2132 of FIG. 23) to facilitate a one-to-oneconnection between the contact members 2231 and the contact pads 2132.

One example type of contact member 2231 is shown in FIGS. 28-30. In oneimplementation, the contact member 2231 defines a planar body. In oneimplementation, the contact member 2231 is formed monolithically. Eachcontact member 2231 defines at least three moveable contact locations2235, 2238, and 2239. The flexibility of the contact surfaces 2235,2238, and 2239 provides tolerance for differences in spacing between thecontact member 2231 and the respective printed circuit board 2220 whenthe coupler assembly 2200 is manufactured. Certain types of contactmembers 2231 also include at least one stationary contact 2233.

In the example shown in FIGS. 32-33, two contact members 2231 arevisibly positioned within a slot 2214 defined in a fiber optic adapter2210, shown in cross-section. Two additional contact members 2231 alsoare positioned in the slot 2214, but cannot be seen since the additionalcontact members 2231 laterally align with the visible contact members2231. In other implementations, however, greater or fewer contactmembers 2231 may be positioned within the housing.

The example contact member 2231 shown includes a base 2232 that isconfigured to be positioned within a slot 2214 defined by an adapter2210. The base 2232 of certain types of contact members 2231 isconfigured to secure (e.g., snap-fit, latch, pressure-fit, etc.) to theadapter 1210. First and second legs 2241, 2242 extend from the base2232. A first arm 2234 extends from the first leg 2241 and defines afirst moveable contact location 2235 between the two legs 2241, 2242(e.g., at a distal end of the arm 2234).

At least the first moveable contact location 2235 is aligned andconfigured to extend outwardly of the adapter housing 2210 through theslots 2214 to touch a first contact pad on the corresponding circuitboard 2220 (e.g., see FIG. 43). The ability of the first arm to flexrelative to the legs 2241, 2242 provides tolerance for placement of thecontact member 2231 relative to the circuit board 2220. In certainimplementations, each of the legs 2241, 2242 defines a stationarycontact location 2233 that also touches the first contact pad on thecircuit board 2220. In one implementation, the stationary contacts 2233and first moveable contact 2235 provide grounding of the contact member2231.

A second arm 2236 extends from the second leg 2242 to define a resilientsection 2237, a second moveable contact location 2238, and a thirdmoveable contact location 2239. In one implementation, the secondcontact location 2238 defines a trough located on the second leg 2234between the resilient section 2237 and the third contact location 2239.The resilient section 2237 is configured to bias the second contactlocation 2238 towards the channel 2218 (e.g., see FIGS. 32 and 33). Inthe example shown, the resilient section 2237 is implemented as alooped/bent section of the second arm 2236. In other implementations,the second arm 2236 can otherwise include springs, reduced widthsections, or portions formed from more resilient materials.

The third contact location 2239 is configured to be positioned initiallywithin the slot 2214. The resilient section 2237 is configured to biasthe third contact location 2239 through the slot 2214 to an exterior ofthe housing 2210 when a connector arrangement 2100 or other mediasegment pushes against the second contact location 2238. For example,inserting an MPO connector 2110 into a connection end of a passage 2215of an MPO adapter 2210 would cause the storage section 2115 of theconnector housing 2110 to slide through the channel 2218 and to engagethe second contact location 2238 of each contact member 2231 associatedwith that connection end of the passage 2215. The storage section 2115would push outwardly on the second contact location 2238, which wouldpush the third contact location 2239 through the slots 2214 and towardthe printed circuit board 2220 mounted to the adapter 2210 adjacent theslots 2214 (see FIG. 43).

As discussed above, a processor (e.g., processor 217 of FIG. 2) or othersuch equipment also can be electrically coupled to the printed circuitboard 2220. Accordingly, the processor can communicate with the memorycircuitry on the storage device 2130 via the contact members 2231 andthe printed circuit board 2220. In accordance with some aspects, theprocessor is configured to obtain physical layer information from thestorage device 2130. In accordance with other aspects, the processor isconfigured to write (e.g., new or revised) physical layer information tothe storage device 2130. In accordance with other aspects, the processoris configured to delete physical layer information to the storage device2130. In one example implementation, at least a first contact member2231 transfers power, at least a second contact member 2231 transfersdata, and at least a third contact member 2231 provide grounding.However, any suitable number of contact members 2231 can be utilizedwithin each media reading interface 2230.

In accordance with some aspects, the contact members 2231 are configuredto selectively form a complete circuit with one or more of the printedcircuit boards 2220. For example, each printed circuit board 2220 mayinclude two contact pads for each contact member. In certainimplementations, a first portion of each contact member 2231 touches afirst of the contact pads and a second portion of each contact member2231 selectively touches a second of the contact pads. The processorcoupled to the circuit board 2220 may determine when the circuit iscomplete. Accordingly, the contact members 2231 can function as presencedetection sensors for determining whether a media segment has beeninserted into the passages 2215.

In certain implementations, the first moveable contact 2235 of eachcontact member is configured to contact one of the contact pads of thecircuit board 2220. In one implementation, the first moveable contactlocation 2235 is configured to permanently touch the contact pad as longas the circuit board 2220 and contact member 2231 are assembled on theadapter 2210. The third contact location 2239 of certain types ofcontact members 2231 is configured to touch a second contact pad of theprinted circuit board 2220 only when a segment of physicalcommunications media (e.g., an MPO connector 2110) is inserted within anadapter passage 2215 and pushes the second contact location 2238 out ofthe channel 2218, which pushes the third contact location 2239 throughthe slot 2214 and against the circuit board 2220. In accordance withother aspects, the contact members 2231 are configured to form acomplete circuit with the printed circuit board 2220 regardless ofwhether a media segment is received in the passage 2215.

Referring to FIGS. 35-43, dust caps 2250 can be used to protect passages2215 of the adapter housings 2210 when fiber optic connectors 2110 orother physical media segments are not received within the passages 2215.For example, a dust cap 2250 can be configured to fit within a frontentrance or a rear entrance of each adapter passage 2215. The dust caps2250 are configured to inhibit the ingress of dust, dirt, or othercontaminants into the passage 2215. In accordance with someimplementations, the dust caps 2250 are configured not to trigger thepresence sensor/switch of the adapter 2210.

FIGS. 36-41 show one example implementation of an adapter dust cap 2250.The example dust cap 2250 includes a cover 2251 configured to fit over amouth of the passage 2215. A handle including a stem 2253 and grip 2254extend outwardly from a first side of the cover 2251. The handlefacilitates insertion and withdrawal of the dust cap 2250 from thepassage 2215. In the example shown, an outer side of the grip 2254 isgenerally flat. In other embodiments, the grip 2254 can be contoured,textured, or otherwise non-planar.

A retaining section 2252 extends outwardly from a second side of thecover 2251. The retaining section 2252 defines a concave contour 2256extending between two fingers 2258. One or both fingers 2258 includelugs 2255 that are configured to interact with the flexible tabs 2219 ofthe adapter housing 2210 to retain the dust cap 2250 within the passage2215. In the example shown, each lug 2255 defines a ramped surface.

In some implementations, the retaining section 2252 is configured to fitwithin the passage 2215 without pressing against the second contactlocation 2238 of each contact member 2231 of the first media readinginterface 2230 (see FIG. 43). In the example shown, the retainingsection 2252 defines a sufficiently concave contour to accommodate thesecond contact location 2238 of each contact member 2231. Insertion ofthe dust cap 2250 within the passage 2215 does not cause the thirdcontact location 2239 to press against the first printed circuit board2220A. Accordingly, insertion of the dust cap 2250 does not trigger thepresence detection sensor/switch.

FIG. 43 shows a cross-sectional view of an MPO adapter housing 2210sandwiched between a first printed circuit board 2220A and a secondprinted circuit board 2220B. The MPO adapter housing 2210 defines apassage 2215, a channel 2218 extending inwardly from each connection endof the passage 2215, and slots 2214 extending through opposing ends 2212of the housing 2210. A first media reading interface 2230A is positionedin the first channel 2218 and interacts with the first printed circuitboard 2220A. A second media reading interface 2230B is positioned in thesecond channel 2218 and interacts with the second printed circuit board2220B.

FIGS. 44-81 illustrate a third example implementation of a connectorsystem 4000 that can be utilized on a connector assembly (e.g., acommunications panel) having PLI functionality as well as PLMfunctionality. One example connector assembly on which the connectorsystem 4000 can be implemented is a bladed chassis. The connector system4000 includes at least one example communications coupler assembly 4200and at least two connector arrangements 4100.

The communications coupler assembly 4200 is configured to be mounted toa connector assembly, such as a communications blade or a communicationspanel. One or more connector arrangements 4100, which terminate segments4010 of communications media, are configured to communicatively coupleto other segments of physical communications media at the couplerassembly 4200 (e.g., see FIGS. 60-61). Accordingly, communications datasignals carried by a media segment 4010 terminated by a first connectorarrangement 4100 can be propagated to another media segment 4010 (e.g.,terminated by a second connector arrangement 4100) through thecommunications coupler assembly 4200.

In accordance with some aspects, each connector arrangement 4100 isconfigured to terminate a single segment of physical communicationsmedia. For example, each connector arrangement 4100 can include a singleconnector 4110 that terminates a single optical fiber or a singleelectrical conductor (FIG. 45). In one example implementation, eachconnector arrangement 4100 includes a single LC-type fiber opticconnector 4110 that terminates a single optical fiber. In accordancewith other aspects, each connector arrangement 4100 includes two or moreconnectors 4110, each of which terminates a single segment of physicalcommunications media. For example, each connector arrangement 4100 maydefine a duplex fiber optic connector arrangement including twoconnectors 4110, each of which terminates an optical fiber 4010 (FIG.45). In other implementations, the connector 4110 can be an SC-type, anST-type, an FC-type, an LX.5-type, etc.

In accordance with still other aspects, each connector arrangement 4100can include one or more connectors, each of which terminates a pluralityof physical media segments (e.g., see connector arrangement 2100, 2100,and 5100 of FIGS. 31, 59, and 82). In one example implementation, eachconnector arrangement includes a single MPO-type fiber optic connectorthat terminates multiple optical fibers. In still other systems, othertypes of connector arrangements (e.g., electrical connectorarrangements) can be secured to the communications coupler assembly 4200or to a different type of coupler assembly.

In accordance with some aspects, each communications coupler assembly4200 is configured to form a single link between segments of physicalcommunications media 4010. For example, each communications couplerassembly 4200 can define a single passage at which a first connectorarrangement is coupled to a second connector arrangement. In accordancewith other aspects, however, each communications coupler assembly 4200is configured to form two or more links between segments of physicalcommunications media. For example, in the example shown in FIG. 44, thecommunications coupler assembly 4200 defines four passages 4215.

In some implementations, each passage 4215 of the communications couplerassembly 4200 is configured to form a single link between first andsecond connector arrangements 4100. In other example implementations,two or more passages 4215 can form a single link between connectorarrangements 4100 (e.g., two sets of ports can form a single linkbetween two duplex connector arrangements). In still other exampleimplementations, each communications coupler assembly 4200 can form aone-to-many link. For example, the communications coupler assembly 4200can connect a duplex connector arrangement to two simplex connectorarrangements.

Example implementations of connector arrangements 4100 are shown inFIGS. 45-55. Each of the connector arrangements 4100 includes one ormore fiber optic connectors 4110, each of which terminates one or moreoptical fibers 4010 FIG. 46). In the example shown in FIGS. 44-46, eachconnector arrangement 4100 defines a duplex fiber optic connectorarrangement including two fiber optic connectors 4110 held togetherusing a clip 4150. In another example implementation, a connectorarrangement 4100 can define a simplex fiber optic connector 4110.

As shown in FIG. 46, each fiber optic connector 4110 includes aconnector body 4111 protecting a ferrule 4112 that retains an opticalfiber 4010. The connector body 4111 is secured to a boot 4113 forproviding bend protection to the optical fiber 4010. In the exampleshown, the connector 4110 is an LC-type fiber optic connector. Theconnector body 4111 includes a fastening member (e.g., clip arm) 4114that facilitates retaining the fiber optic connector 4110 within apassage 4215 in the communications coupler assembly 4200. The connectorbody 4111 also defines a through hole (or opposing depressions) 4117 tofacilitate maintaining the body 4111 within the clip 4150 (e.g., seeFIG. 46).

One example clip 4150 is shown in FIGS. 44 and 46. The clip 4150includes a body 4151 that defines openings or channels 4152 throughwhich portions 4119 of the fiber optic connector bodies 4111 can extend(see FIG. 46). In the example shown, the clip 4150 has a monolithic body4151 defining two channels 4152 separated by an interior wall 4156. Lugs4157 are positioned on the inner surfaces of the exterior walls of thebody 4151 and on both sides of the interior wall 4156. The lugs 4157 areconfigured to engage cavities/depressions 4117 defined in the fiberoptic connector bodies 4111 to secure the connector bodies 4111 withinthe clip body 4151. A flange 4153 curves upwardly and forwardly toextend over the fastening members 4114 of the connectors 4110 (see FIG.45). The flange 4153 is sufficiently flexible to enable the applicationof pressure on the clip arms 4114 of the connectors 4110 by pressing ona distal end of the flange 4153.

Each connector arrangement 4100 is configured to store physical layerinformation. For example, a storage device 4130 may be installed on orin the body 4111 of one or more of the fiber optic connectors 4110 ofeach connector arrangement 4100. In the example shown, the storagedevice 4130 is installed on only one fiber optic connector 4110 of aduplex connector arrangement 4100 (FIG. 45). In other implementations,however, a storage device 4130 may be installed on each fiber opticconnector 4110 of a connector arrangement 4100.

One example storage device 4130 includes a printed circuit board 4131(FIG. 65) on which memory circuitry can be arranged. Electrical contacts4132 (FIG. 68) also may be arranged on the printed circuit board 4131for interaction with a media reading interface of the communicationscoupler assembly 4200 (described in more detail herein). In one exampleimplementation, the storage device 4130 includes an EEPROM circuit 4133(FIG. 68) arranged on the printed circuit board 4131. In the exampleshown in FIG. 46, an EEPROM circuit 4133 is arranged on the non-visibleside of the circuit board 4131. In other implementations, however, thestorage device 4130 can include any suitable type of non-volatilememory.

As shown in FIGS. 47-49, the body 4111 of one example fiber opticconnector 4110 may define a recessed section or cavity 4116 in which thestorage device 4130 may be positioned. In some implementations, thecavity 4116 is provided in the key 4115 of the connector 4110. In otherimplementations, the cavity 4116 may be provided elsewhere in theconnector 4110. In some implementations, the cavity 4116 has a steppedconfiguration 4160 to facilitate positioning of the storage device 4130.

In the example shown, the cavity 4116 includes a well 4162 surrounded bya ledge 4164. The ledge 4164 is configured to support the storage device4130. For example, the ledge 4164 may support the printed circuit board4131 of an example storage device 4130. The well 4162 is sufficientlydeep to accommodate an EEPROM circuit 4133 coupled to one side of theprinted circuit board 4131. The ledge 4164 is recessed sufficientlywithin the connector body 4111 to enable electrical contacts 4132provided on the opposite side of the printed circuit board 4131 to begenerally flush with the key 4115 of the connector body 4111 (see FIG.64).

In certain implementations, the ledge 4164 has a ridged or otherwisecontoured surface to facilitate mounting the storage device within thecavity 4116. For example, in some implementations, contoured sections4166 of the ledge 4164 may increase the surface area over which anadhesive may be applied to secure the storage device 4130 within thecavity 4116. In the example shown, the contoured sections 4166 includerectangular-shaped protrusions and/or depressions. In otherimplementations, however, the ledge 4164 may have bumps, ridges, or someother texture to increase the surface area over which adhesive isapplied.

FIGS. 50-55 show three different implementations of an example storagedevice 4130 installed on an example connector 4110. FIGS. 50 and 51 showa first example connector 4110A that includes a key 4115 having a widthW8. The key 4115 has a front surface 4118 against which contacts 4231(see FIGS. 63-68) of the communications coupler assembly 4200 deflectduring insertion of the connector 4110 as will be described in moredetail herein. In the example shown, the deflection surface 4118 definesa bullnose. In other implementations, the deflection surface 4118 maydefine any suitable shape.

The key 4115 also defines a recessed section or cavity 4116A in which astorage device 4130A can be positioned (e.g., see FIG. 49). In theexample shown in FIG. 51, the cavity 4116A is defined in a top of thekey 4115 and not on or in the deflecting surface 4118. In someimplementations, a cover can be positioned over the storage device 4130Ato enclose the storage device 4130A within the recessed section 4116A ofthe connector housing 4111. In other implementations, the storage device4130A is left uncovered and exposed.

The storage device 4130A shown in FIG. 51 includes generally planarcontacts 4132A positioned on a generally planar circuit board 4131A.Memory 4133 (FIGS. 60-61) of the storage device 4130A, which is locatedon the non-visible side of the board in FIG. 51, is accessed by engagingthe tops of the contacts 4132A with one or more electrically conductivecontact members (e.g., contact member 4231 of FIG. 63). In certainimplementations, the contact member 4231 initially contacts thedeflecting surface 4118 and subsequently slides or wipes across thecontacts 4132A (see FIGS. 63-68).

In some implementations, the contacts 4132A have different lengths. Incertain implementations, the contacts 4132A have different shapes. Forexample, in some implementation, the contacts 4132A include one or morecontact members 4132A′ that have generally rounded ends at one or bothends of the contact members 4132A′. In certain implementations, thecontacts 4132A also include one or more contact members 4132A″ that aregenerally L-shaped. In the example shown, the L-shaped contacts 4132A″are longer than the rounded end contacts 4132A′. In otherimplementations, however, the contacts 4132A may have the same length ormay each have different lengths.

FIGS. 52 and 53 show a second example connector 4110B that includes akey 4115 having a deflection surface 4118. The key 4115 defines arecessed section or cavity 4116B in which a storage device 4130B can bepositioned. In the example shown, the cavity 4116B cuts into thedeflecting surface 4118 of the key 4115. In some implementations, acover can be positioned over the storage device 4130B to enclose thestorage device 4130B within the connector housing 4111. In otherimplementations, the storage device 4130B is left uncovered and exposed.

The storage device 4130B shown in FIG. 53 includes contacts 4132B havingfirst sections 4135B that extend over a generally planar circuit board4131B and folded sections 4134B that curve, fold, or bend over a frontend 4136B of the board 4131B. In the example shown, the first sections4135B of the contacts 4132B have two different lengths. In otherimplementations, however, the first sections 4135B of the contacts 4132Bmay all be the same length or may each be a different length. In certainimplementations, at least some of the first sections 4135B may beL-shaped and at least some of the first sections 4135B may have arounded edge. The memory 4133 of the storage device 4130B, which islocated on the non-visible side of the board in FIG. 53, is accessed bysliding or wiping the contact member 4231 (FIG. 63) of the couplerassembly 4200 across the folded sections 4134B of the contacts 4132Band/or the planar sections 4135B of the contacts 4132B.

FIGS. 54 and 55 show a third example connector 4110C that includes a key4115 having a deflection wall 4118. The key 4115 defines a recessedsection or cavity 4116C in which a storage device 4130C can bepositioned. In the example shown, the cavity 4116C cuts into thedeflection wall 4118 of the key 4115. In some implementations, a covercan be positioned over the storage device 4130C to enclose the storagedevice 4130C within the connector housing 4111. In otherimplementations, the storage device 4130C is left uncovered and exposed.

The storage device 4130C shown in FIG. 55 includes contacts 4132C havingfirst sections 4135C that extend over a generally planar circuit board4131C and contoured sections 4134C that curve, fold, or bend over acontoured section 4136C at the front of the board 4131C. In the exampleshown, the first sections 4135C of the contacts 4132C have two differentlengths. In other implementations, however, the first sections 4135C ofthe contacts 4132C may all be the same length or may each be a differentlength. In certain implementations, one or more of the first sections4135C may be L-shaped and one or more of the first sections 4135C mayhave a rounded edge. The memory 4133 of the storage device 4130C, whichis located on the non-visible side of the board in FIG. 55, is accessedby sliding or wiping the contact member 4231 (FIG. 63) of the couplerassembly 4200 across the contoured section 4134C of the contacts 4132C.

FIGS. 56-61 show one example implementation of a communications couplerassembly 4200 implemented as a fiber optic adapter. The examplecommunications coupler assembly 4200 includes an adapter housing 4210defining one or more passages 4215 configured to align and interface twoor more fiber optic connectors 4110 (e.g., see FIG. 44). In otherexample implementations, however, one or more passages 4215 can beconfigured to communicatively couple together a fiber optic connector4110 with a media converter (not shown) to convert the optical datasignals into electrical data signals, wireless data signals, or othersuch data signals. In other implementations, however, the communicationscoupler assembly 4200 can include an electrical termination block thatis configured to receive punch-down wires, electrical plugs (e.g., forelectrical jacks), or other types of electrical connectors.

The example adapter housing 4210 shown in FIGS. 56-61 is formed fromopposing sides 4211 interconnected by first and second ends 4212. Thesides 4211 and ends 4212 each extend between a front and a rear. Theadapter housing 4210 defines one or more passages 4215 extending betweenthe front and rear ends. Each end of each passage 4215 is configured toreceive a connector arrangement or portion thereof (e.g., one fiberoptic connector 4110 of duplex connector arrangement 4100 of FIG. 44).In the example shown, the adapter housing 4210 defines four passages4215. In other implementations, however, the adapter housing 4210 maydefine one, two, three, six, eight, ten, twelve, sixteen, or even moreports. Sleeves (e.g., split sleeves) 4206 are positioned within thepassages 4215 to receive and align the ferrules 4112 of fiber opticconnectors 4110 (see FIG. 61).

In the example shown, the body 4210 of the fiber optic adapter 4200defines four passages 4215. In other implementations, the body 4210 candefine greater or fewer passages 4215. For example, in some exampleimplementations, the body 4210 of the fiber optic adapter 4200 candefine a single passage 4215 that is configured to optically coupletogether two fiber optic connectors 4110. In other exampleimplementations, the fiber optic adapter 4200 can define two, eight, ortwelve passages 4215 that are each configured to optically coupletogether two fiber optic connectors 4110. In certain implementations,the adapter housing 4210 also defines latch engagement channel 4217(FIG. 56) at each port to facilitate retention of the latch arms 4114 ofthe fiber optic connectors 4110. Each latch engagement channel 4217 issized and shaped to receive the key 4115 of the connector 4110.

The fiber optic adapter 4210 includes one or more media readinginterfaces 4230, each configured to acquire the physical layerinformation from the storage device 4130 of a fiber optic connector 4110plugged into the fiber optic adapter 4210. For example, in oneimplementation, the adapter 4210 can include a media reading interface4230 associated with each passage 4215. In another implementation, theadapter 4210 can include a media reading interface 4230 associated witheach connection end of each passage 4215. In still otherimplementations, the adapter 4210 can include a media reading interface4230 associated with each of a set of passages 4215 that accommodate aconnector arrangement 4100.

For example, the quadruplex adapter 4210 shown in FIG. 58 includes amedia reading interface 4230A at the front connection end of twopassages 4215 to interface with two duplex fiber optic connectorarrangements 4100 received thereat and two media reading interfaces4230B at the rear connection end of two passages 4215 to interface withtwo duplex fiber optic connector arrangements 4100 received thereat. Inanother implementation, one side of the adapter housing 4210 can includetwo media reading interfaces 4230 to interface with two duplex fiberoptic connector arrangements 4100 and another side of the adapterhousing 4210 can include four media reading interfaces to interface withfour separate fiber optic connectors 4110. In other implementations, theadapter housing 4210 can include any desired combination of front andrear media reading interfaces 4230.

In general, each media reading interface 4230 is formed from one or morecontact members 4231 (see FIG. 63). In certain implementations, a topsurface of the coupler housing 4210 defines slots 4214 configured toreceive one or more contact members 4231. When a connector 4110 with astorage device 4130 is inserted into one of the passages 4215 of thecoupler housing 4210, the contact pads 4132 of the storage device 4130are configured to align with the slots 4214 defined in the adapterhousing 4210. Accordingly, the contact members 4231 held within theslots 4214 align with the contact pads 4132.

At least a portion of each slot 4214 extends through the top surface tothe passage 4215. In some implementations, the material height of thetop surface is at least 0.76 mm (0.03 inches). Indeed, in someimplementations, the material height of the top surface is at least 1.02mm (0.04 inches). In certain implementations, the material height of thetop surface is at least 1.27 mm (0.05 inches).

In some implementations, the media reading interface 4230 includesmultiple contact members 4231. For example, in certain implementations,the media reading interface 4230 includes at least a first contactmember 4231 that transfers power, at least a second contact member 4231that transfers data, and at least a third contact member 4231 thatprovides grounding. In one implementation, the media reading interface4230 includes a fourth contact member. In other implementations, themedia reading interface 4230 include greater or fewer contact members4231.

In some implementations, each contact member 4231 is retained within aseparate slot 4214. For example, in the implementation shown in FIGS.56-62, each media reading interface 4230 includes four contact members4231 that are held in a set 4213 (FIG. 59) of four slots 4214 that alignwith four contact pads 4132 on a connector storage device 4130. Theslots 4214 in each set 4213 are separated by intermediate walls 4216(FIGS. 59 and 61). In other implementations, all of the contact members4231 in a single media reading interface 4230 may be retained in asingle slot 3214.

In some implementations, the adapter housing 4210 has more sets 4213 ofslots 4214 than media reading interfaces 4230. For example, in someimplementations, each adapter housing 4210 defines a set 4213 of slots4214 at each connection end of each passage 4215. In otherimplementations, however, the adapter housing 4210 may have the samenumber of slot sets 4213 and media reading interfaces 4231. For example,in certain implementations, each adapter housing 4210 may defines a set4213 of slots 4214 at only one connection end of each passage 4215. Inother implementations, the adapter housing 4210 may define a set 4213 ofslots 4214 at each connection end of alternate passages 4215.

In some implementations, the contact members 4231 of a single mediareading interface 4230 are positioned in a staggered configuration. Insome implementations, the slots 4214 accommodating the staggered contactmembers 4231 also are staggered. For example, as shown in FIGS. 58-59,alternating slots 4214 can be staggered in a front to rear direction. Inother implementations, however, the slots 4214 accommodating thestaggered contacts 4231 may each have a common length that is longerthan a length of the staggered arrangement of contact members 4231. Instill other implementations, the front and rear ends of the contactmembers 4231 of a single media reading interface 4230 are transverselyaligned within similarly transversely aligned slots 4214.

In the example shown in FIGS. 58-59, the slots 4214 defined at frontconnection ends of the adapter passages 4215 axially align with slots4214 defined at the rear connection ends. In other implementations,however, the slots 4214 at the front connection ends may be staggeredfrom the slots 4214 at the rear connection ends. As shown in FIGS. 60and 61, at least one support wall 4205 separates the forward slots 4214from the rearward slots 4214. Each support wall 4205 extends from theslotted top surface 4212 of the adapter housing 4210 to at least thesplit sleeve 4206.

In some implementations, a single support wall 4205 extends along acenter of the adapter housing 4210 transverse to the insertion axis A₁(FIG. 56) of the passages 4215. For example, a single support wall 4205may extend through an adapter housing 4210 that defines transverselyaligned slots 4214. In other implementations, one or more support walls4205 may extend between slots 4214 arranged in a staggeredconfiguration. In the example shown, adjacent support walls 4205 areoffset from each other along an insertion axis of the passages 4215 toaccommodate the staggered slots 4214 arrangements. In certainimplementations, the support walls 4205 may connect to or be continuouswith the intermediate walls 4216.

As shown in FIG. 59, each set 4213 of slots 4214 accommodating one mediareading interface 4230 has a width W5 and each slot 4214 has a width W6.Intermediate walls 4216, which separate the slots 4214 of each set 4213,each have a width W7. In general, the width W5 of each set 4213 of slots4214 is smaller than the width W8 (FIG. 48) of the key 4115 of theconnector 4110 positioned in the respective adapter passage 4215. Insome implementations, the width W5 of each set 4213 of slots 4214 isless than 3.35 mm (0.13 inches). Indeed, in some implementations, thewidth W5 of each set 4213 of slots 4214 is less than about 3.1 mm (0.12inches). In certain implementations, the width W5 of each set 4213 ofslots 4214 is no more than about 2.5 mm (0.10 inches). In one exampleimplementation, the width W5 of each set 4213 of slots 4214 is no morethan 2.2 mm (0.09 inches). In one example implementation, the width W5of each set 4213 of slots 4214 is about 2 mm (0.08 inches). In oneexample implementation, the width W5 of each set 4213 of slots 4214 isabout 2.1 mm (0.081 inches).

In certain implementations, the width W7 of the intermediate walls 4216is smaller than the width W6 of the slots 4214. In some implementations,the width W6 of each slot 4214 is within the range of about 0.25 mm(0.010 inches) to about 0.64 mm (0.025 inches). Indeed, in someimplementations, the width W6 of each slot 4214 is within the range ofabout 0.28 mm (0.011 inches) to about 0.48 mm (0.019 inches). In oneimplementation, the width W6 of each slot is about 0.3 mm (0.012inches). In one implementation, the width W6 of each slot is about 0.28mm (0.011 inches). In one implementation, the width W6 of each slot isabout 0.33 mm (0.013 inches). In some implementations, the width W7 ofeach intermediate wall 4216 is within the range of about 0.13 mm (0.005)inches to about 0.36 mm (0.014 inches). In one implementation, the widthW7 of each intermediate wall 4216 is about 0.28 mm (0.011 inches). Inanother implementation, the width W7 of each intermediate wall 4216 isabout 0.15 mm (0.006 inches).

As shown in FIG. 62, a printed circuit board 4220 is configured tosecure (e.g., via fasteners 4222) to the adapter housing 4210. In someimplementations, the example adapter housing 4210 includes two annularwalls 4218 in which the fasteners 4222 can be inserted to hold theprinted circuit board 4220 to the adapter housing 4210. Non-limitingexamples of suitable fasteners 4222 include screws, snaps, and rivets.For ease in understanding, only a portion of the printed circuit board4220 is shown in FIG. 62. It is to be understood that the printedcircuit board 4220 electrically connects to a data processor and/or to anetwork interface (e.g., the processor 217 and network interface 216 ofFIG. 2). It is further to be understood that multiple communicationscoupler housings 4210 can be connected to the printed circuit board 4220within a connector assembly (e.g., a communications panel).

The contact members 4231 extend between the slotted surface of theadapter housing 4210 and the passages 4215. Portions of each contactmember 4231 engage contacts and tracings on the printed circuit board4220 mounted to the slotted surface of the adapter housing 4210. Otherportions of the contact members 4231 engage the electrical contacts 4132of the storage members 4130 attached to any connector arrangements 4100positioned in the passages 4215 (see FIG. 67). A processor coupled tothe circuit board 4220 can access the memory 4133 of each connectorarrangement 4100 through corresponding ones of the contact members 4231,4131.

In some implementations, each media reading interface 4230 of the fiberoptic adapter 4200 includes four contact members 4231 (see FIG. 56) andeach storage device 4130 of the fiber optic connector 4110 includes fourcontact pads 4132 (see FIGS. 50-55). In the example shown in FIGS.64-67, two contact members 4231 are visibly positioned within a slot4214 defined in a fiber optic adapter 4210, shown in cross-section. Twoadditional contact members 4231 also are positioned in the slot 4214,but cannot be seen since the additional contact members 4231 laterallyalign with the visible contact members 4231. In other implementations,however, greater or fewer contact members 4231 may be positioned withinthe housing.

In accordance with some aspects, the media reading interfaces 4230 ofthe adapter are configured to detect when a connector arrangement isinserted into one or more passages 4215. The contact members 4231 canfunction as presence detection sensors or trigger switches. In someimplementations, the contact members 4231 of a media reading interface4230 are configured to form a complete circuit with the circuit board4220 only when a connector 4110 is inserted within a respective passage4215. For example, at least a portion of each contact member 4231 may beconfigured to contact the circuit board 4220 only after being pushedtoward the circuit board 4220 by a connector 4210. In other exampleimplementations, portions of the contact members 4231 can be configuredto complete a circuit until pushed away from the circuit board 4220 or ashorting rod by a connector 4110. In accordance with other aspects,however, some implementations of the contact members 4231 may beconfigured to form a complete circuit with the circuit board 4220regardless of whether a connector 4110 is received in a passage 4215.

One example type of contact member 4231 is shown in FIG. 63. Eachcontact member 4231 includes at least three moveable (e.g., flexible)contact sections 4233, 4235, and 4236 defining contact surfaces. Theflexibility of the contact sections 4233, 4235, and 4236 providestolerance for differences in spacing between the contact member 4231 andthe respective printed circuit board 4220 when the coupler assembly 4200is manufactured. Certain types of contact members 4231 also include atleast one stationary contact 4237 having a contact surface of thecontact member 4231.

The first moveable contact section 4233 is configured to extend throughthe slot 4214 and engage the circuit board 4220. The first stationarycontact 4237 also is configured to extend through the slot 4214 toengage the circuit board 4220. The ability of the first contact section4233 to flex relative to the stationary contact 4237 provides tolerancefor placement of the contact member 4231 relative to the circuit board4220. The second moveable contact section 4235 is configured to extendinto the passage 4215 and engage the connector 4110 positioned in thepassage 4215. If a storage device 4130 is installed on the connector4110, then the second contact surface 4235 is configured to engage thecontact pads 4132 of the storage device 4130.

The third moveable contact surface 4236 is configured to selectivelyextend through the slot 4214 and engage the circuit board 4220. Forexample, the third contact surface 4236 may be configured to engage thecircuit board 4220 when a connector 4110 is inserted into a passage 4215corresponding with the contact member 4231. The example contact member4231 also includes a resilient section 4234 that biases the thirdcontact surface 4236 upwardly through the slot 4214 (e.g., toward thecircuit board 4220). In some implementations, the resilient section 4234defines at least a partial arc. For example, in the implementation shownin FIG. 63, the resilient section 4234 defines a partial circle. Inother implementations, the resilient section 4234 may define a series ofcurves, folds, and/or bends.

The example contact member 4231 is configured to seat in one of theslots 4214 of the adapter housing 4210. For example, the contact member4231 includes a base 4232 that is configured to abut the support wall4205 of the adapter housing 4210 (see FIGS. 61-67). In oneimplementation, the side of the base 4232 that abuts the support wall4205 is flat. In another implementation, the side of the base 4232 thatabuts the support wall 4205 defines one or more notches. One end 4237 ofthe base 4232 defines a stationary contact 4237 that is configured toextend through the slot 4214 and contact the circuit board 4220.

Another end of the base 4232 defines an attachment section 4238 thatengages a portion of the support wall 4205 to secure the contact member4231 within the slot 4214. In some implementations, the attachmentsection 4238 of the contact member 4231 includes a first leg 4241 and asecond leg 4243 extending from the base 4232 (FIG. 63). In oneimplementation, the first leg 4241 defines a bump 4242. In oneimplementation, the attachment section 4238 is configured to snap-fitinto the support wall 4205. In other implementations, the attachmentsection 4238 may otherwise mount to the support wall 4205.

The example contact member 4231 also includes a third leg 4244 thatextends outwardly from the base 4232 generally parallel with the secondleg 4243. A distal end of the third leg 4244 bends or curves upwardlytoward the circuit board 4220. In the example shown, the third leg 4244is generally J-shaped. In other implementations, the third leg 4244 maybe L-shaped, C-shaped, V-shaped, etc. The first contact surface 4233 isdefined at the distal end of the third leg 4244. In the example shown,the distal end of the third leg 4244 defines an arched or ball-shapedfirst contact surface 4233. In one implementation, the first contactsection 4233 and/or the stationary contact 4237 may provide groundingfor the contact member 4231 through the circuit board 4220.

The contact member 4231 also includes a fourth leg 4245 that extendsoutwardly from the base 4232. In the example shown, the fourth leg 4245extends outwardly between the second and third legs 4243, 4244 andgenerally parallel to the second and third legs 4243, 4244. The fourthleg 4245 separates into first arm 4246, which defines the third contactsurface 4236, and a second arm 4247, which defines the second contactsurface 4235. The first arm 4246 extends upwardly from the fourth leg4245 towards the circuit board 4220. For example, in someimplementations, the first arm 4246 arcs upwardly into a planarextension that terminates at the third contact surface 4236. In theexample shown, the third contact surface 4236 defines an arched orball-shaped distal end of the first arm 4246.

The second arm 4247 initially extends away from the fourth leg 4245 andsubsequently extends back towards the base 4232 to increase the beamlength of the contact 4231. For example, in some implementations, thesecond arm 4247 extends downwardly to define the resilient section 4234and upwardly into a bend section 4239. From the bend section 4239, thesecond arm 4247 changes direction (i.e., curves, bends, folds, arcs,angles, etc.) downwardly and back toward the base 4232 along anelongated section 4248, which may be straight or contoured. In theexample shown, the elongated section 4248 defines a bend about part-waythrough.

A tail 4249 extends from the elongated section 4248 toward the base4230. In the example shown, the tail 4249 curves downwardly to definethe second contact surface 4235 before curving upwardly towards the base4232. As shown in FIGS. 66-68, at least a portion of the elongatedsection 4248 and the tail 4249 extend completely through the slots 4214and into the socket 4215. At least a distal end of the tail 4249 of eachcontact member 4231 extends out of the socket 4215 and back into therespective slot 4214. Accordingly, the tail 4249 is inhibited fromtouching the adjacent contact members 4231.

At least the tail 4249 of the contact member 4231 is configured todeflect or flex when the front surface 4118 of the key 4115 of aconnector 4110 pushes against a portion of the second arm 4247 of thecontact member 4231 when a connector 4110 is inserted into the socket4215. In the example shown, the tail 4249 and the elongated portion 4248flex when deflected by the key 4115. For example, the elongated portion4248 and tail 4249 flex when the deflecting surface 4118 pushes againstan outer surface of the elongated section 4248. In some implementations,the tail 4249 defines the second contact surface 4235. In otherimplementations, an outer surface of the elongated section 4248 definesthe second contact surface 4235. In still other implementations, theelongated section 4248 and the tail 4249 cooperate to define the secondcontact section 4235.

The resilient section 4234 is configured to transfer the force appliedto a second arm 4247 of the contact member 4231 to the first arm 4246.For example, in some implementations, the resilient section 4234 isconfigured to lift the first arm 4246 to swipe the third contact surface4236 against the printed circuit board 4220 (see FIGS. 66-68). Incertain implementations, the inner side of the elongated section 4248 isconfigured to abut against the resilient section 4234 when a connector4110 is positioned in the passage 4215 to aid in transferring the forceto the first arm 4246.

In some implementations, the body of the contact member 4231 extendsbetween a first and second end. In the example shown in FIG. 63, thebase 4232 is located at the first end and the third contact section 4236is located at the second end. The contact member 4231 also extendsbetween a top and a bottom. In some implementations, the contactsurfaces of the first and third contact sections 4233, 4236 face the topof the contact member 4231 and the contact surface of the second contactsection 4235 faces the bottom of the contact member 4231. In the exampleshown, the first and third contact sections 4233, 4236 extend at leastpartially towards the top of the contact member 4231 and the secondcontact section 4235 extends towards the bottom of the contact member4231. As used herein, the terms “top” and “bottom” are not meant toimply a proper orientation of the contact member 4231 or that the top ofthe contact member 4231 must be located above the bottom of the contactmember_4231. Rather, the terms are used for ease in understanding andare assigned relative to the viewing plane of FIG. 63.

The contact member 4231 defines a body having a circumferential edge4240 (FIG. 72) extending between planar major sides (FIG. 63). Incertain implementations, the edge 4240 defines the contact surface ofeach contact section 4233, 4235, 4236, 4237 (see FIG. 68). In someimplementations, the edge 4240 has a substantially continuous thicknessT (FIG. 72). In various implementations, the thickness T ranges fromabout 0.05 inches to about 0.005 inches. In certain implementations, thethickness T is less than about 0.02 inches. In some implementation, thethickness T is less than about 0.012 inches. In another implementation,the thickness T is about 0.01 inches. In another implementation, thethickness T is about 0.009 inches. In another implementation, thethickness T is about 0.008 inches. In another implementation, thethickness T is about 0.007 inches. In another implementation, thethickness T is about 0.006 inches. In other implementations, thethickness T may vary across the body of the contact member 4231.

Portions of the planar surfaces of the contact member 4231 may increaseand/or decrease in width. For example, in the example shown in FIG. 63,the base 4232 is wider than each of the arms 4243, 4244, 4245. The bendsection 4239 is wider than the resilient section 4234. In certainimplementations, each of the contact surfaces of the contact sections4233, 4235, 4236 are rounded or otherwise contoured. For example, inFIG. 63, the first and third contact sections 4233, 4236 define bulboustips and the second contact section 4235 defines an arced sectionextending from a linear section of the contact member 4231 (see FIG.63).

In one implementation, the contact member 4231 is formed monolithically(e.g., from a continuous sheet of metal or other material). For example,in some implementations, the contact member 4231 may be manufactured bycutting a planar sheet of metal or other material. In otherimplementations, the contact member 4231 may be manufactured by etchinga planar sheet of metal or other material. In other implementations, thecontact member 4231 may be manufactured by laser trimming a planar sheetof metal or other material. In still other implementations, the contactmember 4231 may be manufactured by stamping a planar sheet of metal orother material.

FIGS. 64-67 illustrate one example contact member 4231 positioned in aslot 4214 of an adapter 4210 before and after insertion of a connector4110 in a passage 4215 of the adapter 4210. In the example shown, thefirst leg 4241 of the attachment section 4238 extends generallyvertically and the second leg 4243 extends generally horizontally (e.g.,see FIGS. 65-68). In some implementations, the support wall 4205 of theadapter housing 4210 defines a recess or channel 4208 and an extension4207 (FIG. 65). When the attachment section 4238 is mounted to thesupport wall 4205, the first leg 4241 of the attachment section 4238fits in the recess 4208 and the second leg 4242 seats on the extension4207. The first contact surface 4233 extends through the slot 4214 andcontacts the circuit board 3220.

In some implementations, a support portion 4209 (FIGS. 65-68) of theadapter housing 4210 projects partially into the passages 4215 oppositethe support wall 4205. The support portion 4209 defines a ledge 4219recessed within each slot 4214. The distal end of the first arm 4246seats on the ledge 4219 spaced from the circuit board 4220 when aconnector 4110 is not positioned within a respective passage 4215 (seeFIGS. 64-65). Inserting a connector 4110 into the passage 4215 biasesthe distal end of the first arm 4246 upwardly from the ledge 4219 towardthe circuit board 4220 (see FIGS. 66-68). In certain implementations,biasing the distal end of the first arm 4246 upwardly causes the thirdcontact surface 4236 to engage (e.g., touch or slide against) thecircuit board 4220.

The tail 4249 of the contact member 4231 extends into the passage 4215associated with the slot 4214. Inserting the connector 4110 into thepassage 4215 causes the deflection surface 4118 of the key 4115 of aconnector 4110 to press against the outer surface of the elongatedsection 4248 (see FIGS. 64 and 65). The deflection surface 4118 deflectsthe elongated section 4248 and the tail 4249 upwardly and toward thesupport wall 4205. In certain implementations, the inner surface of theelongated portion 4248 abuts against and applies an upwardly directedpressure to the resilient section 4234 of the contact member 3231. Theresilient section 4234 biases the distal end of the first arm 4246 ofthe contact member 4231 through the slot 4214 to slide or wipe acrossthe circuit board 4220 (see FIGS. 66-71). Accordingly, the presence ofthe connector 4110 in the passage 4215 may be detected when thedeflection surface 4118 of the connector key 4115 engages the contactmember 4231.

In some implementations, the connector 4110 does not include a storagedevice 4130. For example, the connector 4110 may be part of a duplexconnector arrangement 4100 in which the other connector 4110 holds thestorage device 4130. In other implementations, the connector 4110 may bean existing connector that does not store physical layer information. Inother implementations, however, the connector 4110 may include a storagedevice 4130. In such implementations, the second contact surface 4235 ofthe contact member 4231 slides or wipes across the surface of thecontacts 4132 of the storage device 4130 during insertion of theconnector (see FIGS. 66-68).

In some implementations, the storage device 4130 is stored in a cavitydefined only in a top of the key 4115 (e.g., see FIG. 48). In suchimplementations, the second contact surface 4235 of the connector 4130is defined by a leading edge or bottom-most portion of the tail 4249,which slides across the contacts 4132 of the storage device 4130 afterthe tail 4249 is raised by the deflection surface 4118 of the key 4115.Accordingly, the presence of the connector 4110 within the passage 4215may be detected before the memory 4133 of the storage device 4130 can beaccessed.

In other implementations, the storage device 4130 is accessible througha recess in the deflection surface 4118 (e.g., see FIGS. 50 and 54). Insuch implementations, the second contact surface 4235 of the connector4130 is defined by the outer edge of the elongated section 4248, whichtouches the storage device contacts 4132 as the elongated section 4248is being deflected by the deflection surface 4118. Accordingly, thepresence of the connector 4110 within the passage 4215 may be detectedat approximately the same time that the memory 4133 of the storagedevice 4130 can be accessed.

As discussed above, a processor (e.g., processor 217 of FIG. 2) or othersuch equipment also can be electrically coupled to the printed circuitboard 4220. Accordingly, the processor can communicate with the memorycircuitry 4133 on the storage device 4130 via the contact members 4231and the printed circuit board 4220. In accordance with some aspects, theprocessor is configured to obtain physical layer information from thestorage device 4130. In accordance with other aspects, the processor isconfigured to write (e.g., new or revised) physical layer information tothe storage device 4130. In accordance with other aspects, the processoris configured to delete physical layer information to the storage device4130. In still other implementations, the processor detects the presenceor absence of a connector 4110 in each passage 4215.

Removing the connector 4110 from the passage 4215 releases the secondarm 4247 from the upwardly biased position (see FIG. 66), therebyallowing the elongated portion 4248 and tail 4249 to move back to theunbiased position (see FIG. 64). When in the unbiased position, anupward pressure is no longer applied to the resilient section 4234.Accordingly, the resilient section 4234 allows the distal end of thefirst arm 4246 to drop into the slot 4214 and rest against the ledge4219 (see FIG. 64). Dropping the first arm 4246 disengages the thirdcontact surface 4236 from the circuit board 4220, thereby interruptingthe circuit created by the contact member 4231. Interrupting the circuitenables a processor connected to the circuit board 4220 to determinethat the connector 4110 has been removed from the passage 4215.

FIGS. 69-72 shows one example implementation of the circuit board 4220described above. The same or similar circuit boards 4220 are suitablefor use in any of the coupler assemblys described herein. In someimplementations, the circuit board 4220 defines fastener receivingopenings 4227 through which fasteners 4222 may be inserted to secure thecircuit board 4220 (see FIG. 62).

The example circuit board 4220 includes a plurality of first contactpads 4223 and a plurality of second contact pads 4224 spaced from thefirst contact pads 4223. In certain implementations, the first contactpads 4223 are laterally aligned with each other and the second contactpads 4224 are laterally aligned with each other. In otherimplementations, however, the first contact pads 4223 may be laterallyoffset or staggered from each other and/or the second contact pads 4224may be laterally offset of staggered from each other. In certainimplementations, each of the first contact pads 4223 is longitudinallyaligned with one of the second contact pads 4224 to form a landing pair.In other implementations, however, the first and second contact pads4223, 4224 may be longitudinally offset from each other.

A media reading interface (e.g., media reading interface 4230) may beseated on the printed circuit board 4220. In the example shown, thefirst moveable contact surface 4233 of each contact member 4231 of themedia reading interface 4230 touches one of the first contact pads 4223.In certain implementations, the stationary contacts 4237-also touch thefirst contact pads 4223. The third moveable contact surface 4239 of eachcontact member 4231 is configured to selectively touch the secondcontact pad 4224 that forms a landing pair with the first contact pad4223.

FIGS. 73-104 illustrate a fifth example implementation of a connectorsystem 5000 that can be utilized on a connector assembly having PLIfunctionality as well as PLM functionality. The example connector system5000 includes at least one communications coupler assembly 5200positioned between two printed circuit boards 5220. One or more exampleconnector arrangements 5100 (FIGS. 81-83), which terminate segments 5010of communications media, are configured to communicatively couple toother segments of physical communications media at the coupler assemblys5200. Accordingly, communications data signals carried by the mediasegments 5010 terminated by the connector arrangements 5100 can betransmitted to other media segments.

The coupler assembly 5200 includes one or more coupler housings 5210. Atleast one coupler housing 5210 is sandwiched between a first circuitboard 5220A and a second circuit board 5220B (e.g., via fasteners 5222A,5222B). In some implementations, multiple (e.g., two, three, four,eight, twelve, sixteen, twenty, etc.) coupler housings 5210 may besandwiched between two circuit boards (e.g., see FIGS. 52 above). Insome implementations, the first circuit board 5220A can be electricallycoupled to the second circuit board 5220B via a fixed connector (e.g., acard edge connector). In other implementations, the first circuit board5220A can be electrically coupled to the second circuit board 5220B viaa flexible or ribbon cable arrangement. In still other implementations,the circuit boards 5220A, 5220B are interconnected using other suitablecircuit board connection techniques.

For ease in understanding, only portions of the example printed circuitboards 5220A, 5220B of the connector system 5000 are shown in FIG. 73.It is to be understood that the printed circuit boards 5220A, 5220Belectrically connect to a data processor and/or to a network interface(e.g., processor 217 and network interface 216 of FIG. 2) as part of aconnector assembly 5200. As noted above, non-limiting examples of suchconnector assemblies 5200 include bladed chassis and drawer chassis.Furthermore, additional coupler housings 5210 can be connected todifferent portions of the printed circuit boards 5220A, 5220B or atother locations within an example connector assembly.

One example coupler housing 5210 is shown in FIGS. 74-80. The examplecoupler housing 5210 defines a single passage 5215 extending betweenopposite open ends (e.g., a front and rear of the coupler housing 5210).In other example implementations, however, each coupler housing 5210 caninclude a greater number (e.g., two, three, four, six, eight, twelve,etc.) of passages 5215. Each open end of each passage 5215 is configuredto receive a segment of communications media (e.g., a connectorized endof an optical fiber 5010). In some implementations, flexible latchingtabs 5219 are located at the entrances of the passages 5215 to aid inretaining connector arrangements 5100 within the passages 5215. In theexample shown, each latching tab 5219 defines a ramped surface andlatching surface.

In the example shown, each coupler housing 5210 is implemented as afiber optic adapter configured to receive Multi-fiber Push-On (MPO)connectors. Each passage 5215 of the MPO adapters 5210 is configured toalign and connect two MPO connector arrangements 5100 (see FIGS. 97-99).In other implementations, each passage 5215 can be configured to connectother types of physical media segments. For example, one or morepassages 5215 of the MPO adapters 5200 can be configured tocommunicatively couple together an MPO connector arrangement 5100 with amedia converter (not shown) to convert the optical data signals intoelectrical data signals, wireless data signals, or other type of datasignals.

In the example shown in FIGS. 74-80, each adapter 5210 is formed fromopposing sides 5211 interconnected by first and second ends 5212. Thesides 5211 and ends 5212 each extend between an open front and an openrear to define the passage 5215. In some implementations, the sides 5211and ends 5212 define a generally rectangular box. In certainimplementations, a port entrance 5213 extends from the front and rear ofthe adapter 5210. In certain implementation, the port entrance 5213 isoblong-shaped. In the example shown, the entrance 5213 is obround-shapedhaving planar top and bottom surfaces and rounded side surfaces.

The adapter 5210 also includes mounting stations 5217 at which fasteners5222 (FIG. 73) can be received to secure the adapter 5210 to one or moreprinted circuit boards 5220. In certain implementations, the fasteners5222 pass through mounting openings 5227 defined by the printed circuitboard 5220 (FIGS. 101-102). Non-limiting examples of suitable fasteners5222 include screws, snaps, and rivets. For example, the mountingstations 5217 can aid in securing the adapter 5210 to the upper circuitboard 5220A and the lower circuit board 5220B (see FIG. 73). In otherimplementations, the mounting stations 5217 can include latches, panelguides, or other panel mounting arrangements.

In some implementations, the adapter 5210 also includes alignment lugs5216 that facilitate mounting the adapter 5210 to the circuit boards5220 in the correct orientation. For example, the alignment lugs 5216may align with openings 5226 (FIGS. 101-102) defined in the circuitboards 5220 (e.g., see FIG. 73). Accordingly, the alignment lugs 5216inhibit mounting of the adapter 5210 backwards on one or both of thecircuit boards 5220. In the example shown, two alignment lugs 5216extend from a first end 5212 of the adapter 5210 at the front of theadapter 5210 and two alignment lugs 5216 extend from a second end 5212of the adapter 5210 at the rear of the adapter 5210. In otherimplementations, however, greater or fewer alignment lugs 5216 mayextend from the ends 5212 in the same or a different configuration toform a keying arrangement with the printed circuit board 5220.

The MPO adapter 5210 also defines channels 5218 extending partly alongthe length of the passages 5215 (e.g., see FIGS. 77, 79, and 98) toaccommodate portions of the fiber connector arrangements 5100. In someimplementations, the adapter 5210 may define a channel 5218 extendinginwardly from each open end of the passage 5215. In one exampleimplementation, a first channel 5218 extends along a top of the housing5210 from a first end of each passage 5215 and a second channel 5218extends along a bottom of the housing 5210 from a second end of eachpassage 5215.

Each adapter housing 5210 includes at least one media reading interface5230 (e.g., see FIGS. 77, 79, and 98) configured to acquire the physicallayer information from a storage device 5130 of a fiber connectorarrangement 5100 (see FIGS. 83-91). In the example shown, each MPOadapter 5210 includes at least one media reading interface 5230 that isconfigured to communicate with the storage device 5130 on an MPOconnector 5110 plugged into the MPO adapter 5210. For example, in oneimplementation, the adapter 5210 can include a media reading interface5230 associated with each passage 5215. In another implementation, theadapter 5210 can include a media reading interface 5230 associated witheach connection end of a passage 5215. As shown in FIGS. 130 and 132,each media reading interface 5230 includes one or more contact members531 at least extending into the channels 5218 of the adapter 5210.

FIGS. 81-91 show one example implementation of a connector arrangement5100 implemented as an MPO connector 5110 that is configured toterminate a multi-fiber optical cable 5010. As shown in FIG. 83, eachMPO connector 5110 includes a front connector body 5111 and a rearconnector body 5114 enclosing a ferrule 5112 (FIG. 83) that retainsmultiple optical fibers (e.g., 2, 3, 4, 8, 12, or 16 fibers). The frontconnector body 5111 includes a key 5115 that is configured to fit in akeying slot or channel (e.g., channel 5218) defined in the adapter 5210to properly orient the connector 5100. The key 5115 includes a raised(i.e., or stepped up) portion of the front connector body 5111 locatedadjacent the ferrule 5112.

In certain implementations, the connector 5110 includes a pinarrangement 5119 that extends from a front of the ferrule 5112. In otherimplementations, the connector 5110 defines openings in the ferrule 5112for receiving the pin arrangement 5119 of another connector 5100 toalign the ferrules 5112 of the two connectors 5110 (e.g., see FIGS.97-99). The rear connector body 5114 is secured to a boot 5113 toprovide bend protection to the optical fibers. An example MPO dust cap5118 is configured to mount to the front connector body 5111 to coverand protect the ferrule 5112.

Each connector arrangement 5100 is configured to store physical layerinformation (e.g., media information). For example, the physical layerinformation can be stored in a memory device 5130 mounted on or in theconnector 5110. One example storage device 5130 includes a printedcircuit board 5131 on which memory circuitry can be arranged (e.g., seeFIGS. 87-91). Electrical contacts 5132 also may be arranged on theprinted circuit board 5131 for interaction with a media readinginterface of the communications coupler assembly 5200 (described in moredetail herein). In one example implementation, the storage device 5130includes an EEPROM circuit 5133 arranged on the printed circuit board5131. In the example shown in FIG. 83, an EEPROM circuit 5133 isarranged on the non-visible side of the circuit board 5131. In otherimplementations, however, the storage device 5130 can include anysuitable type of non-volatile memory.

As shown in FIGS. 84-86, the front body 5111 of one example fiber opticconnector 5110 may define a recessed section or cavity 5116 in which thestorage device 5130 may be positioned. In some implementations, thecavity 5116 is provided in the key 5115 of the connector 5110. In otherimplementations, the cavity 5116 may be provided elsewhere in theconnector 5110. In some implementations, the cavity 5116 has a steppedconfiguration 5160 to facilitate positioning of the storage device 5130.

In the example shown, the cavity 5116 includes a well 5162 surrounded bya ledge 5164 (see FIG. 86). The ledge 5164 is configured to support thestorage device 5130. For example, the ledge 5164 may support the printedcircuit board 5131 of an example storage device 5130. The well 5162 issufficiently deep to accommodate an EEPROM circuit 5133 coupled to oneside of the printed circuit board 5131. The ledge 5164 is recessedsufficiently within the connector body 5111 to enable electricalcontacts 5132 provided on the opposite side of the printed circuit board5131 to be generally flush with the key 5115 of the connector body 5111.

In certain implementations, the ledge 5164 has a ridged or otherwisecontoured surface to facilitate mounting the storage device within thecavity 5116. For example, in some implementations, contoured sections5166 of the ledge 5164 may increase the surface area over which anadhesive may be applied to secure the storage device 5130 within thecavity 5116. In the example shown, the contoured sections 5166 includerectangular-shaped protrusions and/or depressions. In otherimplementations, however, the ledge 5164 may have bumps, ridges, or someother texture to increase the surface area over which adhesive isapplied.

FIGS. 73 and 87-91 show three different implementations of examplestorage devices 5130 installed on example connectors 5110. FIGS. 73 and87 show a first example connector 5110 that includes a key 5115 having awidth W9 (FIG. 137). The key 5115 has a front surface 5118 against whichcontacts 5231 of the communications coupler assembly 5200 deflect duringinsertion of the connector 5110 as will be described in more detailherein. The key 5115 also defines a recessed section or cavity 5116A inwhich a storage device 5130A can be positioned. In the example shown inFIG. 87, the cavity 5116A is defined in a top of the key 5115 and not onor in the deflecting surface 5118. In some implementations, a cover canbe positioned over the storage device 5130A to enclose the storagedevice 5130A within the recessed section 5116A of the key 5115. In otherimplementations, the storage device 5130A is left uncovered and exposed.

The storage device 5130A shown in FIG. 87 includes generally planarcontacts 5132A positioned on a generally planar circuit board 5131A.Memory 5133 (FIGS. 97-99) of the storage device 5130A, which is locatedon the non-visible side of the board in FIG. 87, is accessed by engagingthe tops of the contacts 5132A with an electrically conductive contactmember (e.g., contact member 5231 of FIGS. 78 and 80). In certainimplementations, the contact member 5231 initially contacts thedeflecting surface 5118 and subsequently slides or wipes across thecontacts 5132A (see FIGS. 97-99).

In some implementations, the contacts 5132A have different lengths. Incertain implementations, the contacts 5132A have different shapes. Forexample, in some implementation, the contacts 5132A include one or morecontact members 5132A′ that have generally rounded ends opposite thedeflecting end 5118 of the connector housing 5110. In certainimplementations, the contacts 5132A also include one or more contactmembers 5132A″ that are generally L-shaped. In the example shown, theL-shaped contacts 5132A″ are longer than the rounded end contacts5132A′. In other implementations, however, the contacts 5132A may havethe same length or may each have different lengths.

FIGS. 88 and 89 show a second example front connector body 5110B thatincludes a key 5115 having a deflection surface 5118B. The key 5115defines a recessed section or cavity 5116B in which a storage device5130B can be positioned. In the example shown, the cavity 5116B cutsinto the deflecting surface 5118B of the key 5115. In someimplementations, a cover can be positioned over the storage device 5130Bto enclose the storage device 5130B within the key 5115. In otherimplementations, the storage device 5130B is left uncovered and exposed.In the example shown, the first sections 5135B of the contacts 5132Bhave two different lengths. In other implementations, however, the firstsections 5135B of the contacts 5132B may all be the same length or mayeach be a different length. In certain implementations, the contacts5132B may be the same shape of different shapes.

The storage device 5130B shown in FIG. 89 includes contacts 5132B havingfirst sections 5135B that extend over a generally planar circuit board5131B and folded sections 5134B that curve, fold, or bend over a frontend 5136B of the board 5131B. In some implementations, the memory 5133of the storage device 5130B, which is located on the non-visible side ofthe board in FIG. 89, is accessed by sliding or wiping the contactmember 5231 (FIGS. 79 and 81) of the coupler housing 5210 across thefolded sections 5134B of the contacts 5132B. In other implementations,the memory 5133 of the storage device 5130B is accessed by sliding orwiping the contact member 5231 of the coupler housing 5210 across thefirst sections 5135B of the contacts 5132B.

FIGS. 90 and 91 show a third example front connector body 5110C thatincludes a key 5115 having a deflection wall 5118. The key 5115 definesa recessed section or cavity 5116C in which a storage device 5130C canbe positioned. In the example shown, the cavity 5116C cuts into thedeflection wall 5118C of the key 5115. In some implementations, a covercan be positioned over the storage device 5130C to enclose the storagedevice 5130C within the key 5115. In other implementations, the storagedevice 5130C is left uncovered and exposed. In the example shown, thefirst sections 5135C of the contacts 5132C have two different lengths.In other implementations, however, the first sections 5135C of thecontacts 5132C may all be the same length or may each be a differentlength. In certain implementations, the contacts 5132C may be differentshapes or the same shape.

The storage device 5130C shown in FIG. 91 includes contacts 5132C havingfirst sections 5135C that extend over a generally planar circuit board5131C and contoured sections 5134C that curve, fold, or bend over acontoured section 5136C at the front of the board 5131C. In someimplementations, the memory 5133 of the storage device 5130C, which islocated on the non-visible side of the board in FIG. 91, is accessed bysliding or wiping the contact member 5231 (FIGS. 78 and 80) of thecoupler housing 5210 across the contoured section 5134C of the contacts5132C. In other implementations, the memory 5133 of the storage device5130C is accessed by sliding or wiping the contact member 5231 of thecoupler housing 5210 across the first sections 5135C of the contacts5132C.

In general, memory circuitry is arranged on a circuit board 5131 of thestorage device 5130 and connected to the contacts 5132 via conductivetracings. In one example embodiment, the storage device 5130 includes anEEPROM circuit arranged on the printed circuit board 5131. In otherembodiments, however, the storage device 5130 can include any suitabletype of memory. In some implementations, the cavity 5116 is two-tiered,thereby providing a shoulder on which the storage device 5130 can restand space to accommodate circuitry (e.g., memory 5133) located on abottom of the storage device 5130. In other implementations, the storagedevice 5130 can be otherwise mounted to the connector housing 5110.

FIGS. 92-94 show an example media reading interface 5230 of the MPOadapter 5200. In general, each media reading interface 5230 is formedfrom one or more contact members 5231. One or both ends 5212 of theadapter housing 5210 defines one or more slots 5214 that lead to thechannels 5218 (see FIG. 97). The contact members 5231 are positionedwithin the slots 5214 as will be described in more detail herein. Incertain implementations, at least a portion of each contact member 5231extends into the respective channel 5218 (e.g., see FIG. 97) to engagethe electrical contacts 5132 of the storage member 5130 of any MPOconnector 5100 positioned in the passage 5215. Other portions of thecontact members 5231 are configured to protrude outwardly through theslots 5214 to engage contacts and tracings on a printed circuit board5220 (e.g., see FIG. 97).

In some implementations, the MPO adapter housing 5210 includes a firstmedia reading interface 5230A and a second media reading interface5230B. For example, in some implementations, the first media readinginterface 5230A is associated with a first connection end of the passage5215 and the second media reading interface 5230B is associated with asecond connection end of the passage 5215. In the example shown, thesecond media reading interface 5230B is flipped (i.e., located on anopposite side of the housing 5210) relative to the first media readinginterface 5230A. In some such implementations, the channel 5218extending inwardly from the first connection end of the passage 5215also is flipped with respect to the channel 5218 extending inwardly fromthe second end of the passage 5215 (compare FIGS. 77 and 78). In otherimplementations, each adapter housing 5210 may include greater or fewermedia reading interfaces 5230.

In the example shown in FIGS. 74, 75, 97, and 98, flipping theorientation of the connectors 5110 between the front and rear portsenables each of the major surfaces 5212 of the adapter 5210 to beconfigured to receive only one media reading interface 5130 for eachpassage 5215. For example, in some implementations, the media readinginterfaces 5130 for the front ports of the passages 5215 areaccommodated by a first of the major surfaces 5212 and the media readinginterfaces 5130 for the rear ports of the passages 5215 are accommodatedby a second of the major surfaces 5212. Such a configuration enableseach slot 5214 to extend more than half-way between the front and rearof the adapter 5210.

In other implementations, each major surface 5212 of the adapter 5210may accommodate the media reading interfaces 5130 for some of the frontports and some of the rear ports. For example, in one implementation,each major surface 5212 accommodates the media reading interfaces foralternating ones of the front and rear ports. In particular, a firstslot in the first major surface 5212 may accommodate a media readinginterface 5130 for a front port of a first passage 5215 and a first slot5214 in the second major surface 5212 may accommodate a media readinginterface 5130 for a rear port of the first passage 5215. A second slot5214 in the first major surface 5212 may accommodate a media readinginterface 5130 for a rear port of a second passage 5215 and a secondslot 5214 in the second major surface 5212 may accommodate a mediareading interface 5130 for a front port of the second passage 5215. Suchconfigurations also enable each slot 5214 to extend more than half-waybetween the front and rear of the adapter 5210.

Lengthening the slots 5214 enables longer contact members 5231 to bereceived within each slot 5214. For example, each contact member 5231may extend at least half-way across the adapter 5210 between the frontand rear of the adapter 5210. In certain implementations, each contactmember 5231 may extend across a majority of the distance between thefront and rear of the adapter 5210. Lengthening the contact members 5231increases the beam length of each contact member 5231. The beam lengthaffects the ability of the contact member 5231 to deflect toward andaway from the circuit boards 5220.

In some implementations, the contact members 5231 of a single mediareading interface 5230 are positioned in a staggered configuration tofacilitate access to the contacts 5132 on the connector storage device5130 of a connector arrangement 5100. For example, alternating contactmembers 5231 can be staggered between at least front and rear locationswithin the channels 5218. FIG. 92 is a perspective view of an examplecoupler housing 5210 with first and second media reading interfaces5230A, 5230B exploded out from the slots 5214 defined in the couplerhousing 5210. FIG. 93 shows the contact members 5231 of an example mediareading interface 5230 positioned within an example slot 5214 in astaggered configuration. In other implementations, the contact members5231 may be laterally aligned.

In some implementations, each media reading interface 5230 includesabout four contact members 5231 (see FIG. 92). In the example shown inFIGS. 97-100, at least portions of two contact members 5231 are visiblypositioned within a slot 5214 defined in a fiber optic adapter 5210,shown in cross-section. Two additional contact members 5231 also arepositioned in the slot 5214, but cannot be seen since the additionalcontact members 5231 laterally align with the visible contact members5231. In other implementations, however, greater or fewer contactmembers 5231 may be positioned within the housing 5210.

One example type of contact member 5231 suitable for use in forming amedia reading interface 5230 is shown in FIGS. 94-95. Each contactmember 4231 defines at least three moveable (e.g., flexible) contactlocations 5235, 5238, and 5239. The flexibility of the contact surfaces5235, 5238, and 5239 provides tolerance for differences in spacingbetween the contact member 5231 and the respective printed circuit board5220 when the coupler assembly 5200 is manufactured. Certain types ofcontact members 5231 also include at least one stationary contact 5233.

The example contact member 5231 shown includes a base 5232 that isconfigured to be positioned within a slot 5214 defined by an adapter5210. The base 5232 of certain types of contact members 5231 isconfigured to secure (e.g., snap-fit, latch, pressure-fit, etc.) to theadapter 5210. A first arm 5234 of the contact member 5231 defines thefirst moveable contact location 5235 (e.g., at a distal end of the firstarm 5234). A second arm 5236 of the contact member 5231 defines aresilient section 5237, the second moveable contact location 5238, andthe third moveable contact location 5239. The base 5232 of the contactmember body 5240 defines a support surface 5241 extending between firstand second legs 5242, 5243, respectively. The first arm 5234 extendsfrom the first leg 5242 and the second arm 5236 extends from the secondleg 5243. In the example shown, the first and second arms 5234, 5236extend in generally the same direction from the first and second legs5242, 5243.

Mounting sections 5244 are provided on the base 5232 between the supportsurface 5241 and the legs 5242, 5243. In the example shown, the mountingsections 5244 each include a recessed notch and a protruding bump tofacilitate securing the base 5232 in a slot 5214 of the adapter 5210. Inother implementations, however, other types of mounting configurationsmay be utilized. The second leg 5243 and the second arm 5236 define asecond support surface 5245. In the example shown, the second supportsurface 5245 is rounded. In other implementations, the second supportsurface 5245 may define a right angle or an oblique angle.

At least the first moveable contact location 5235 is aligned andconfigured to extend outwardly of the adapter housing 5210 through theslots 5214 to touch a first contact pad on the corresponding circuitboard 5220 (e.g., see FIGS. 97-99). The ability of the first arm 5234 toflex relative to the legs 5242, 5243 provides tolerance for placement ofthe contact member 5231 relative to the circuit board 5220. In certainimplementations, each of the legs 5242, 5243 defines a stationarycontact location 5233 that also touches the first contact pad on thecircuit board 5220. In one implementation, the stationary contacts 5233and first moveable contact 5235 provide grounding of the contact member5231.

In some implementations, the resilient section 5237 is implemented as alooped/bent section of the second arm 5236. In one implementation, theresilient section 5237 of the second arm 5236 is formed from one or moreelongated sections connected by U-shaped bends. In otherimplementations, the second arm 5236 can otherwise include springs,reduced width sections, or portions formed from more resilientmaterials. In the example shown, the resilient section 5237 is formedfrom a first elongated section 5246 extending away from the second leg5243, a second elongated section 5247 extending generally parallel tothe first elongated section 5246 back towards the second leg 5243, and athird elongated section 5248 extending generally parallel to the firstand second elongated sections 5246, 5247 and away from the second leg5243.

The third elongated section 5248 includes a trough that defines thesecond contact location 5238. In certain implementations, the troughdefining the second contact location 5238 is located at an intermediateportion of the third elongated section 5248. In one implementation, thetrough defining the second contact location 5238 is located at about thecenter of the third elongated member 5248. A tail 5249 extends from thethird elongated section 5248 to define the third contact location 5239.In some implementations, the tail 5249 is generally S-shaped. In otherimplementations, however, the tail 5249 may be C-shaped, J-shaped,U-shaped, L-shaped, or linear.

In some implementations, the body of the contact member 5231 extendsbetween a first and second end. In the example shown in FIG. 94, thefirst leg 5242 is located at the first end and the third contact section5239 is located at the second end. The contact member 5231 also extendsbetween a top and a bottom. In some implementations, the contactsurfaces of the first and third contact sections 5235, 5239 face and/ordefine the top of the contact member 5231 and the contact surface of thesecond contact section 5238 faces and/or defines the bottom of thecontact member 5231. In the example shown, the first and third contactsections 5235, 5239 extend at least partially towards the top of thecontact member 5231 and the second contact section 5238 extends towardsthe bottom of the contact member 5231. As used herein, the terms “top”and “bottom” are not meant to imply a proper orientation of the contactmember 5231 or that the top of the contact member 5231 must be locatedabove the bottom of the contact member 5231. Rather, the terms are usedfor ease in understanding and are assigned relative to the viewing planeof FIG. 94.

The contact member 5231 defines a body having a circumferential edge5240 (FIG. 95) extending between planar major sides (FIG. 94). Incertain implementations, the edge 5240 defines the contact surface ofeach contact section 5233, 5235, 5238, 5239 (see FIGS. 99-102). In someimplementations, the edge 5240 has a substantially continuous thicknessT2 (FIG. 95A). In various implementations, the thickness T2 ranges fromabout 0.05 inches to about 0.005 inches. In certain implementations, thethickness T2 is less than about 0.02 inches. In some implementation, thethickness T2 is less than about 0.012 inches. In another implementation,the thickness T2 is about 0.01 inches. In another implementation, thethickness T2 is about 0.009 inches. In another implementation, thethickness T2 is about 0.008 inches. In another implementation, thethickness T2 is about 0.007 inches. In another implementation, thethickness T2 is about 0.006 inches. In other implementations, thethickness T2 may vary across the body of the contact member 5231.

Portions of the planar surfaces of the contact member 5231 may increaseand/or decrease in width. For example, in the example shown in FIG. 94,the base 5232 and legs 5242, 5243 are wider than either of the arms5234, 5236. In certain implementations, the contact surface of the firstcontact section 5235 may be rounded or otherwise contoured. For example,in FIG. 94, the first contact section 5235 defines a bulbous tip. Thesecond contact section 5238 defines a trough in the third elongatedmember 5248. The mounting sections 5244 define detents and protrusionsin the planar surface of the base 5232.

In some implementations, the contact member 5231 is formedmonolithically (e.g., from a continuous sheet of metal or othermaterial). For example, in some implementations, the contact member 5231may be manufactured by cutting a planar sheet of metal or othermaterial. In other implementations, the contact member 5231 may bemanufactured by etching a planar sheet of metal or other material. Inother implementations, the contact member 5231 may be manufactured bylaser trimming a planar sheet of metal or other material. In still otherimplementations, the contact member 5231 may be manufactured by stampinga planar sheet of metal or other material.

FIG. 97 shows a cross-sectional view of an MPO adapter housing 5210defining a passage 5215 extending between the front and rear of theadapter 5210. The adapter housing 5210 is sandwiched between the firstexample circuit board 5220F and the second example circuit board 5220Svia fasteners 5222. A first connector 5100F is fully inserted into theadapter passage 5215 from the front end of the adapter 5210 and a secondconnector 51005 is partially inserted into the adapter passage 5215 fromthe rear end of the adapter 5210. In some implementations, each of theconnectors 5100F, 5100S includes a storage device 5130F, 5130S,respectively. In other implementations, only one of the connectors5100F, 5100S includes a storage device.

The adapter housing 5210 defines at least a first slot 5214F extendingthrough a top end 5212F of the adapter 5210 and at least a second slot5214S extending through a bottom end 5212S of the adapter 5210. In someimplementations, each end 5212F, 5212S of the adapter housing 5210defines one slot 5214 that is configured to hold one or more contactmembers 5231. In other implementations, each end 5212F, 5212S of theadapter housing 5210 defines multiple slots 5214F, 5214S, which are eachconfigured to hold one or more contact members 5231. The slots 5214F,5214S extend at least part-way across the passage 5215. In the exampleshown, each slot 5214F, 5214S extends across a majority of the length ofthe passage 5215. In other implementations, each slot 5214F, 5214S mayextend a greater or lesser distance across the passage 5215.

As discussed above, each adapter 5210 includes a first channel 5218Fextending inwardly from a front connection end of the passage 5215 and asecond channel 5218S extending inwardly from a rear connection end ofthe passage 5215. Each channel 5218F, 5218S is configured to accommodatethe key 5215 of the respective connector 5100F, 5100S. In someimplementations, each channel 5218F, 5218S extends about half-waythrough the passage 5215. In other implementations, each channel 5218F,5218S extends a greater or lesser distance through the passage 5215.Each channel 5218F, 5218S is associated with one of the slots 5214F,5214S. In some implementations, each channel 5218F, 5218S extends fullyacross the respective slot 5214F, 5214S. In other implementations, eachchannel 5218F, 5218S extends only partially across the respective slot5214F, 5214S.

In some implementations, at least a portion of each slot 5214F, 5214Sextends partially through the top and bottom ends 5212F, 5212S of theadapter 5210. For example, one or more portions of the slots 5214F,5214S can extend through the respective ends 5212F, 5212S to recessedsurfaces 5205 (FIG. 98). In certain implementations, at least a portionof each slot 5214F, 5214S is shallower than the rest of the slot 5214F,5214S. For example, the first and second ends 5212F, 5212S may definesupport walls 5206 (FIG. 98) extending from the recessed surfaces 5205towards the exterior of the ends 5212F, 5212S. At least a portion of thetop and bottom ends 5212F, 5212S of the adapter 5210 define openings5207 (FIG. 98) that connect the slots 5214F, 5214S to the associatedchannels 5218F, 5218S. At least a portion of the top and bottom ends5212F, 5212S defines a shoulder 5209 at one end of each slot 5214F,5214S.

A first media reading interface 5230F is positioned in the first slot5214F and a second media reading interface 5230S is positioned in thesecond slot 5214B. In some implementations, each media reading interface5230F, 5230S includes one or more contact members 5231 (see FIG. 94).The first support surface 5241 of the base 5232 of each contact member5231 is seated on the recessed surface 5205 of each slot 5214F, 5214S.The second support surface 5245 of each contact member 5231 abuts asupport wall 5206 in each slot 5214F, 5214S. The second contact location5238 of each contact member 5231 aligns with the openings 5207 thatconnect the slots 5214F, 5214S to the channels 5218F, 5218S. The thirdcontact location 5239 of each contact members 5237 is accommodated bythe shoulder 5209 at the end of each slot 5214F, 5214S.

In the example shown, the contact members 5231 are staggered within theslots 5214F, 5214S. In other implementations, the contact members 5231may be laterally aligned within the slots 5214F, 5214S. In someimplementations, the first and second ends 5212F, 5212S of the adapter5210 define intermediate walls that extend between pairs of adjacentcontact members 5231. The intermediate walls inhibit contact betweenadjacent contact members 5231. In certain implementations, theintermediate walls extend fully between the adjacent contact members5231. In other implementations, intermediate wall sections 5204 extendbetween portions of the adjacent contact members 5231.

In the example shown in FIG. 98, each slot 5214F, 5214S includes one ormore intermediate wall sections 5204 between each pair of adjacentcontact members 5231. For example, in certain implementations, anintermediate wall section 5204 in each slot 5214F, 5214S extends acrossthe first leg 5242 of one or both contact members 5231 in each pair ofadjacent contact members 5231 to aid in securing the contact member 5231in the respective slot 5214F, 5214S (e.g., see intermediate wall section5204 in slot 5214S in FIG. 98).

In some implementations, an intermediate wall section 5204 in each slot5214F, 5214S extends across the first contact location 5235 of one orboth contact members 5231 in each pair of adjacent contact members 5231(e.g., see intermediate wall section 5204 in slot 5214F in FIG. 98). Forexample, the intermediate wall section 5204 may inhibit lateral bendingof the first arm 5234 of one or more contact members 5231 within theslot 5214F, 5214S. In some implementations, the intermediate wallsection 5204 extends across the first contact locations 5235 ofalternating contact members 5231. In other implementations, theintermediate wall section 5204 is sufficiently wide to extend across thefirst contact locations 5235 of adjacent staggered contact member 5231.In still other implementations, the intermediate wall section 5204 mayextend across the first contact locations 5235 of adjacent non-staggeredcontact members 5231.

In some implementations, an intermediate wall section 5204 extendsacross at least a portion of the second arm 5236 of one or both contactmembers 5231 in each pair of adjacent contact members 5231. In certainimplementations, the intermediate wall section 5204 extends between theU-shaped bends joining the second and third elongated sections 5247,5248 of the resilient sections 5237 of one or more contact members 5231in the slot 5214F, 5214S. In certain implementations, the intermediatewall section 5204 extends across the second leg 5243 of one or bothcontact members 5231 in each pair of adjacent contact members 5231. Incertain implementations, the support walls 5206 extend laterally betweenthe intermediate walls 5204 (e.g., see FIG. 98).

In some implementations, an intermediate wall section 5204 extendsacross the third contact location 5239 of one or both contact members5231 in each pair of adjacent contact members 5231. For example, theintermediate wall section 5204 may inhibit lateral bending of the tail5239 of one or more contact members 5231 within the slot 5214F, 5214S.In certain implementations, the intermediate wall section 5204 extendsbetween the U-shaped bends joining the first and second elongatedsections 5246, 5247 of the resilient sections 5237 of one or morecontact members 5231 in the slot 5214F, 5214S.

As discussed above, a processor (e.g., processor 217 of FIG. 2) or othersuch equipment also can be electrically coupled to the printed circuitboards 5220F, 5220S. Accordingly, the processor can communicate with thememory circuitry on the storage devices 5130F, 51305 via the contactmembers 5231 and the printed circuit boards 5220F, 5220S. In accordancewith some aspects, the processor is configured to obtain physical layerinformation from the storage devices 5130F, 5130S. In accordance withother aspects, the processor is configured to write (e.g., new orrevised) physical layer information to the storage devices 5130F, 5130S.In accordance with other aspects, the processor is configured to deletephysical layer information to the storage device 5130F, 5130S. In oneexample implementation of a media reading interface 5230F, 5230S, atleast a first contact member 5231 transfers power, at least a secondcontact member 5231 transfers data, and at least a third contact member5231 provide grounding. However, any suitable number of contact members5231 can be utilized within each media reading interfaces 5230F, 5230S.

In accordance with some aspects, the contact members 5231 are configuredto selectively form a complete circuit with one or more of the printedcircuit boards 5220. For example, each printed circuit board 5220 mayinclude two contact pads for each contact member. In certainimplementations, a first portion of each contact member 5231 touches afirst of the contact pads and a second portion of each contact member5231 selectively touches a second of the contact pads. The processorcoupled to the circuit board 5220 may determine when the circuit iscomplete. Accordingly, the contact members 5231 can function as presencedetection sensors for determining whether a media segment has beeninserted into the passages 5215.

In certain implementations, the first moveable contact 5235 of eachcontact member is configured to contact one of the contact pads of thecircuit board 5220. In one implementation, the first moveable contactlocation 5235 is configured to permanently touch the contact pad as longas the circuit board 5220 and contact member 5231 are assembled on theadapter 5210. The third contact location 5239 of certain types ofcontact members 5231 is configured to touch a second contact pad of theprinted circuit board 5220 only when a segment of physicalcommunications media (e.g., an MPO connector 5110) is inserted within anadapter passage 5215 and pushes the second contact location 5238 out ofthe channel 2218, which pushes the third contact location 5239 throughthe slot 5214 and against the circuit board 5220. In accordance withother aspects, the contact members 5231 are configured to form acomplete circuit with the printed circuit board 5220 regardless ofwhether a media segment is received in the passage 5215.

For example, as shown in FIGS. 97 and 99, the stationary contacts 5233and the first moveable contact location 5235 of each contact member 5231are configured to extend through the respective slot 5214F, 5214S totouch contacts or tracings on the respective printed circuit board5220F, 5220S mounted to the adapter end 5212A, 5212S defining the slot5214F, 5214S. In certain implementations, the stationary contact 5233and the first contact location 5235 touch the respective printed circuitboard 5220F, 5220S regardless of whether or not a connector arrangement5100F, 5100S has been inserted into the passage 5215.

The resilient section 5237 (FIG. 94) of each contact member 5231 isconfigured to bias the second contact location 5238 out of therespective slot 5214F, 5214S towards the respective channel 5218F,5218S. For example, when a connector arrangement (e.g., see secondconnector arrangement 5100S of FIG. 97) is being inserted into thepassage 5215 of the MPO adapter 5210, the key 5115 of the secondconnector arrangement 5110S slides within the second channel 5218S ofthe adapter 5210. When the second connector arrangement 5100S is atleast partially within the passage 5215, the deflecting end 5118B of thekey 5115 engages the second contact location 5238 of each contact member5231 of the second media reading interface 52305. Continuing to insertthe connector arrangement 5100S biases the second contact locations 5238from the second channel 5218S towards the second slot 5214S.

When a connector arrangement (e.g., see first connector arrangement5100F of FIG. 97) has been fully inserted within the passage 5215 of theadapter 5210, the second contact locations 5238 of the contact members5231 of the first media reading interface 5230F touch the contactmembers 5132 of the storage device 5130F of the first connectorarrangement 5100F (e.g., see FIG. 100). In some implementations, thesecond contact locations 5238 touch the contacts 5132 of the storagedevice 5130F only when the first connector arrangement 5100F has beeninserted completely within the passage 5215. In other implementations,the second contact locations 5238 touch the contacts 5132 of the storagedevice 5130F when the deflecting surface 5118 of the connectorarrangement 5100 contacts the trough defined by the second arm 5236 ofeach contact member 5231.

The third contact location 5239 of each contact member 5231 isconfigured to be positioned initially within the shoulder section 5209of the respective slot 5214F, 5214S of the adapter housing 5210. In someimplementations, the distal end of the tail 5249 rests against theshoulder 5209 when a respective connector arrangement 5100F, 51005 isnot within the passage 5215. In other implementations, the distal end ofthe tail 5249 is located between the shoulder 5209 and the respectiveprinted circuit board 5220 when the respective connector arrangement5100F, 5100S is not within the passage 5215.

The resilient section 5237 of each contact member 5231 is configured tobias the third contact location 5239 away from the shoulder 5209 andtowards the respective circuit board 5220F, 5220S when the respectiveconnector arrangement 5100F, 5100S or other media segment pushes againstthe second contact location 5238 (see FIGS. 98 and 100). For example,inserting an MPO connector (e.g., second connector arrangement 5110S)into the passage 5215 would cause the key 5115 of the second connectorarrangement 5100S to push the second contact location 5238 toward thesecond circuit board 5220S, which would push the third contact location5239 through the second slot 5214S and toward the second circuit board5220S.

In accordance with some aspects, the contact members 5231 are configuredto form a complete circuit with one or more of the printed circuitboards 5220F, 5220S only when a segment of physical communications mediais inserted within the adapter passage 5215. For example, the thirdcontact location 5239 of each contact member 5231 can be configured tocontact the respective circuit board 5220F, 5220S only after beingpushed through the respective slot 5214F, 5214S by the media segment.Accordingly, certain types of contact members 5231 function as presencedetection sensors for determining whether a media segment has beeninserted into the passages 5215.

In certain implementations, the resilient section 5237 of each contactmember 5231 is configured to bias the third contact surface 5239 towardsthe circuit board 5220F, 5220S when the key of a connectorized mediasegment (e.g., MPO connectors 5100F, 5100S) is inserted into the passage5215 regardless of whether a storage device 5130 is provided on or inthe key 5115. In accordance with other aspects, the contact members 5231are configured to form a complete circuit with the respective circuitboard 5220F, 5220S regardless of whether a media segment is received inthe passage 5215.

FIGS. 101-103 show one example implementation of the circuit board 5220described above. The same or similar circuit boards 5220 are suitablefor use in any of the coupler assemblies described herein. In someimplementations, the circuit board 5220 defines fastener receivingopenings 5227 through which fasteners 5222 may be inserted to secure thecircuit board 5220. In certain implementations, the circuit board 5220defines alignment openings 5226 in which alignment lugs 5216 are seated.The example circuit board 5220 includes a plurality of first contactpads 5223 and a plurality of second contact pads 5224 spaced from thefirst contact pads 5223. In certain implementations, the first contactpads 5223 are laterally aligned with each other and the second contactpads 5224 are laterally aligned with each other. In otherimplementations, however, the first contact pads 5223 may be laterallyoffset or staggered from each other and/or the second contact pads 5224may be laterally offset of staggered from each other. In certainimplementations, each of the first contact pads 5223 is longitudinallyaligned with one of the second contact pads 5224 (see FIG. 102) to forma landing pair. In other implementations, however, the first and secondcontact pads 5223, 5224 may be longitudinally offset from each other.

A media reading interface (e.g., media reading interface 5230) may beseated on the printed circuit board 5220. In the example shown, thefirst moveable contact surface 5235 of each contact member 5231 of themedia reading interface 5230 touches one of the first contact pads 5223.In certain implementations, the stationary contacts 5223 also touch thefirst contact pads 5223. The third moveable contact surface 5239 of eachcontact member 5231 is configured to selectively touch the secondcontact pad 5224 that forms a landing pair with the first contact pad5223. In certain implementations, at least a portion of the resilientsection 5237 also selectively touches the second contact pad 5224 (seeFIG. 98) when the third contact surface 5239 touches the second contactpad 5224.

Referring to FIGS. 104-107, dust caps 5250 can be used to protectpassages 5215 of the adapter housings 5210 when connector arrangements5100 or other physical media segments are not received within thepassages 5215. For example, a dust cap 5250 can be configured to fitwithin a front entrance or a rear entrance of each adapter passage 5215.The dust caps 5250 are configured to inhibit the ingress of dust, dirt,or other contaminants into the passage 5215. In accordance with someimplementations, the dust caps 5250 are configured not to trigger thepresence sensor/switch of the adapter 5210.

FIG. 104 shows one example implementation of an adapter dust cap 5250.The example dust cap 5250 includes a cover 5251 configured to fit over amouth 5213 of the passage 5215. A handle including a stem 5253 and grip5254 extend outwardly from a first side of the cover 5251. The handlefacilitates insertion and withdrawal of the dust cap 5250 from thepassage 5215. A retaining section 5252 extends outwardly from a secondside of the cover 5251. The retaining section 5252 defines a concavecontour 5256 extending between two fingers 5258. One or both fingers5258 include lugs 5255 that are configured to interact with the flexibletabs 5219 of the adapter housing 5210 to retain the dust cap 5250 withinthe passage 5215. In the example shown, each lug 5255 defines a rampedsurface.

In some implementations, the retaining section 5252 is configured to fitwithin the passage 5215 without pressing against the second contactlocation 5238 of each contact member 5231 of the media readinginterfaces 5230 (see FIG. 107). In the example shown, the fingers 5258of the retaining section 5252 are sufficiently short to remain withinthe passage 5215 of the adapter 5210 instead of extending into thechannels 5218. Insertion of the dust cap 5250 within the passage 5215does not cause the third contact location 5239 to press against theprinted circuit board 5220. Accordingly, insertion of the dust cap 5250does not trigger the presence detection sensor/switch.

The above specification, examples and data provide a completedescription of the manufacture and use of the composition of theinvention. Since many implementations can be made without departing fromthe spirit and scope of the invention, the invention resides in theclaims hereinafter appended.

1. A fiber optic connector comprising: a connector body configured toterminate at least one optical fiber, the connector body defining a keyarea that defines a cavity, the cavity including an outer ledge, theouter ledge being contoured to increase surface area of the outer ledge;and a storage device mounted to the connector body at the key area, thestorage device being seated on the outer ledge within the cavity at thekey area, the storage device including memory configured to storephysical layer information, the storage device also including at leastone contact member that is electrically connected to the memory, thecontact member being configured to engage with a contact of a mediareading interface of an adapter when the connector body is slid into apassage of the adapter. 2-38. (canceled)
 39. The fiber optic connectorof claim 1, wherein the contact member is flush with a top of the keyarea when the storage device is mounted in the cavity.
 40. The fiberoptic connector of claim 1, wherein the storage device includes aprinted circuit board, wherein the memory is positioned at a first sideof the printed circuit board and the contact member is positioned at asecond side of the printed circuit board.
 41. The fiber optic connectorof claim 40, wherein the memory is an EEPROM chip that is accommodatedwithin the cavity.
 42. The fiber optic connector of claim 40, wherein aplurality of contact members are provided at the second side of theprinted circuit board, each contact member being electrically connectedto the memory.
 43. The fiber optic connector of claim 1, wherein atleast a portion of the storage device extends through a front edge ofthe key area.
 44. The fiber optic connector of claim 43, wherein thecontact member curves over the front edge of the key area.
 45. The fiberoptic connector of claim 1, wherein the storage device includes at leastthree contact members.
 46. The fiber optic connector of claim 45,wherein the storage device includes four contact members.
 47. The fiberoptic connector of claim 45, wherein the contact members of the storagedevice are staggered.
 48. The fiber optic connector of claim 45, whereinthe contact members of the storage device have at least two differentlengths.
 49. The fiber optic connector of claim 45, wherein at leastportions of the contact members of the storage device extend in parallelstrips.
 50. The fiber optic connector of claim 1, wherein the connectorbody defines an LC connector.
 51. The fiber optic connector of claim 1,wherein the connector body defines an MPO connector that is configuredto terminate a plurality of optical fibers.
 52. A fiber optic connectorcomprising: a connector body configured to terminate at least oneoptical fiber, the connector body including a raised portion defining anopen cavity; and a storage device positioned in the cavity defined inthe raised portion of the connector body, the storage device includingmemory circuitry facing an interior of the cavity, the storage devicealso including a plurality of contact members at an open top of thecavity, the contact members being electrically connected to the memorycircuitry, the contact members being configured to engage with contactsof a media reading interface of an adapter when the connector body isslid into a passage of the adapter.
 53. The fiber optic connector ofclaim 52, wherein the contact members are about flush with an externalsurface of the connector body when the storage device is mounted in thecavity.
 54. The fiber optic connector of claim 52, wherein the storagedevice includes a printed circuit board, and wherein the memorycircuitry is positioned at a first side of the printed circuit board andthe contact members are positioned at a second side of the printedcircuit board.
 55. The fiber optic connector of claim 54, wherein thecavity includes an outer ledge on which the first side of the printedcircuit board seats.
 56. The fiber optic connector of claim 52, furthercomprising: an optical fiber having a first end; a ferrule coupled tothe first end of the optical fiber; wherein the connector body housesthe ferrule; and wherein the physical layer information pertains to theoptical fiber, the storage device also including a plurality of contactmembers that are electrically connected to the memory.
 57. The fiberoptic connector of claim 56, wherein the connector body is coupled to asecond connector body using a non-removable clip to form a duplexconnector arrangement.